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| Synonyms = Serotonin-specific reuptake inhibitors, serotonergic antidepressants<ref name="BARLOW">{{cite book| vauthors = Barlow DH, durand VM |title=Abnormal Psychology: An Integrative Approach |edition=Fifth |page=239 |chapter=Chapter 7: Mood Disorders and Suicide |isbn=978-0-495-09556-9 |oclc=192055408 |location=Belmont, CA |publisher=Wadsworth Cengage Learning |year=2009}}</ref> | | Synonyms = Serotonin-specific reuptake inhibitors, serotonergic antidepressants<ref name="BARLOW">{{cite book| vauthors = Barlow DH, durand VM |title=Abnormal Psychology: An Integrative Approach |edition=Fifth |page=239 |chapter=Chapter 7: Mood Disorders and Suicide |isbn=978-0-495-09556-9 |oclc=192055408 |location=Belmont, CA |publisher=Wadsworth Cengage Learning |year=2009}}</ref> | ||
| Image = Serotonin-2D-skeletal.svg | | Image = Serotonin-2D-skeletal.svg | ||
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| alt = Graphic of molecular formula C10H12N2O | | alt = Graphic of molecular formula C10H12N2O | ||
| Width = 220px | | Width = 220px | ||
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SSRIs increase the ] level of the ] ] by ] its ] (reuptake) into the ].<ref>{{cite journal|date=Summer 2002|title=Mechanism of Action of Antidepressants|url=http://pdfs.semanticscholar.org/9848/def34903ad758ec8de1b81c31b603644b396.pdf|archive-url=https://web.archive.org/web/20190228205618/http://pdfs.semanticscholar.org/9848/def34903ad758ec8de1b81c31b603644b396.pdf|url-status=dead|archive-date=2019-02-28|journal=Psychopharmacology Bulletin|volume=36|s2cid=4937890}}</ref> They have varying degrees of selectivity for the other ]s, with pure SSRIs having strong affinity for the ] and only weak affinity for the ] and ]s. | SSRIs increase the ] level of the ] ] by ] its ] (reuptake) into the ].<ref>{{cite journal|date=Summer 2002|title=Mechanism of Action of Antidepressants|url=http://pdfs.semanticscholar.org/9848/def34903ad758ec8de1b81c31b603644b396.pdf|archive-url=https://web.archive.org/web/20190228205618/http://pdfs.semanticscholar.org/9848/def34903ad758ec8de1b81c31b603644b396.pdf|url-status=dead|archive-date=2019-02-28|journal=Psychopharmacology Bulletin|volume=36|s2cid=4937890}}</ref> They have varying degrees of selectivity for the other ]s, with pure SSRIs having strong affinity for the ] and only weak affinity for the ] and ]s. | ||
SSRIs are the most widely prescribed antidepressants in many countries.<ref name="PRESCORN2004">{{cite book |vauthors= Preskorn SH, Ross R, Stanga CY |chapter= Selective Serotonin Reuptake Inhibitors |chapter-url= https://books.google.com/books?id=sO_hArhCxwMC&pg=PA241 | veditors = Preskorn SH, Feighner HP, Stanga CY, Ross R |title= Antidepressants: Past, Present and Future |publisher= Springer |location= Berlin |year=2004 |pages= 241–262 |isbn= 978-3-540-43054-4}}</ref> The efficacy of SSRIs in mild or moderate cases of depression has been disputed<ref> |
SSRIs are the most widely prescribed antidepressants in many countries.<ref name="PRESCORN2004">{{cite book |vauthors= Preskorn SH, Ross R, Stanga CY |chapter= Selective Serotonin Reuptake Inhibitors |chapter-url= https://books.google.com/books?id=sO_hArhCxwMC&pg=PA241 | veditors = Preskorn SH, Feighner HP, Stanga CY, Ross R |title= Antidepressants: Past, Present and Future |publisher= Springer |location= Berlin |year=2004 |pages= 241–262 |isbn= 978-3-540-43054-4}}</ref> The efficacy of SSRIs in mild or moderate cases of depression has been disputed<ref>{{cite web |url=https://www.psychologytoday.com/us/blog/abcs-child-psychiatry/202207/depression-and-serotonin-what-the-new-review-actually-says |work=Psychology Today |title=Depression and Serotonin: What the New Review Actually Says |last=Rettew |first=David |date=2022-07-26 |access-date=2024-09-26}}</ref> and may or may not be outweighed by side effects, especially in adolescent populations.<ref name="Kramer">{{cite news |vauthors= Kramer P |title= In Defense of Antidepressants |date= 7 Sep 2011 |url= https://www.nytimes.com/2011/07/10/opinion/sunday/10antidepressants.html |access-date= 13 July 2011 |newspaper= The New York Times |archive-date= 12 July 2011 |archive-url= https://web.archive.org/web/20110712053223/http://www.nytimes.com/2011/07/10/opinion/sunday/10antidepressants.html |url-status= live }}</ref><ref name="JAMA2010">{{cite journal | vauthors = Fournier JC, DeRubeis RJ, Hollon SD, Dimidjian S, Amsterdam JD, Shelton RC, Fawcett J | title = Antidepressant drug effects and depression severity: a patient-level meta-analysis | journal = JAMA | volume = 303 | issue = 1 | pages = 47–53 | date = January 2010 | pmid = 20051569 | pmc = 3712503 | doi = 10.1001/jama.2009.1943 }}</ref><ref name="Pies">{{cite journal | vauthors = Pies R | title = Antidepressants work, sort of – our system of care does not | journal = Journal of Clinical Psychopharmacology | volume = 30 | issue = 2 | pages = 101–104 | date = April 2010 | pmid = 20520282 | doi = 10.1097/JCP.0b013e3181d52dea | url = https://zenodo.org/record/890741 | access-date = 2019-11-08 | archive-date = 2017-09-13 | archive-url = https://web.archive.org/web/20170913230814/https://zenodo.org/record/890741 | url-status = live }}</ref><ref name=":0" /> | ||
{{TOC limit|3}} | {{TOC limit|3}} | ||
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* A 2012 meta-analysis of fluoxetine and venlafaxine concluded that statistically and clinically significant treatment effects were observed for each drug relative to placebo irrespective of baseline depression severity; some of the authors however disclosed substantial relationships with pharmaceutical industries.<ref>{{cite journal |vauthors=Gibbons RD, Hur K, Brown CH, Davis JM, Mann JJ | title = Benefits from antidepressants: synthesis of 6-week patient-level outcomes from double-blind placebo-controlled randomized trials of fluoxetine and venlafaxine | journal = Archives of General Psychiatry | volume = 69 | issue = 6 | pages = 572–579 | date = June 2012 | pmid = 22393205 | pmc = 3371295 | doi = 10.1001/archgenpsychiatry.2011.2044 }}</ref> | * A 2012 meta-analysis of fluoxetine and venlafaxine concluded that statistically and clinically significant treatment effects were observed for each drug relative to placebo irrespective of baseline depression severity; some of the authors however disclosed substantial relationships with pharmaceutical industries.<ref>{{cite journal |vauthors=Gibbons RD, Hur K, Brown CH, Davis JM, Mann JJ | title = Benefits from antidepressants: synthesis of 6-week patient-level outcomes from double-blind placebo-controlled randomized trials of fluoxetine and venlafaxine | journal = Archives of General Psychiatry | volume = 69 | issue = 6 | pages = 572–579 | date = June 2012 | pmid = 22393205 | pmc = 3371295 | doi = 10.1001/archgenpsychiatry.2011.2044 }}</ref> | ||
* A 2017 systematic review stated that "SSRIs versus placebo seem to have statistically significant effects on depressive symptoms, but the clinical significance of these effects seems questionable and all trials were at high risk of bias. Furthermore, SSRIs versus placebo significantly increase the risk of both serious and non-serious adverse events. Our results show that the harmful effects of SSRIs versus placebo for major depressive disorder seem to outweigh any potentially small beneficial effects".<ref name=":0">{{cite journal | vauthors = Jakobsen JC, Katakam KK, Schou A, Hellmuth SG, Stallknecht SE, Leth-Møller K, Iversen M, Banke MB, Petersen IJ, Klingenberg SL, Krogh J, Ebert SE, Timm A, Lindschou J, Gluud C | title = Selective serotonin reuptake inhibitors versus placebo in patients with major depressive disorder. A systematic review with meta-analysis and Trial Sequential Analysis | journal = BMC Psychiatry | volume = 17 | issue = 1 | pages = 58 | date = February 2017 | pmid = 28178949 | pmc = 5299662 | doi = 10.1186/s12888-016-1173-2 | doi-access = free }}</ref> Fredrik Hieronymus et al. criticized the review as inaccurate and misleading, but they also disclosed multiple ties to pharmaceutical industries and receipt of speaker's fees.<ref>{{cite journal | vauthors = Hieronymus F, Lisinski A, Näslund J, Eriksson E | title = Multiple possible inaccuracies cast doubt on a recent report suggesting selective serotonin reuptake inhibitors to be toxic and ineffective | journal = Acta Neuropsychiatrica | volume = 30 | issue = 5 | pages = 244–250 | pmid = 28718394 | doi = 10.1017/neu.2017.23 | year = 2018 | doi-access = free }}</ref> | * A 2017 systematic review stated that "SSRIs versus placebo seem to have statistically significant effects on depressive symptoms, but the clinical significance of these effects seems questionable and all trials were at high risk of bias. Furthermore, SSRIs versus placebo significantly increase the risk of both serious and non-serious adverse events. Our results show that the harmful effects of SSRIs versus placebo for major depressive disorder seem to outweigh any potentially small beneficial effects".<ref name=":0">{{cite journal | vauthors = Jakobsen JC, Katakam KK, Schou A, Hellmuth SG, Stallknecht SE, Leth-Møller K, Iversen M, Banke MB, Petersen IJ, Klingenberg SL, Krogh J, Ebert SE, Timm A, Lindschou J, Gluud C | title = Selective serotonin reuptake inhibitors versus placebo in patients with major depressive disorder. A systematic review with meta-analysis and Trial Sequential Analysis | journal = BMC Psychiatry | volume = 17 | issue = 1 | pages = 58 | date = February 2017 | pmid = 28178949 | pmc = 5299662 | doi = 10.1186/s12888-016-1173-2 | doi-access = free }}</ref> Fredrik Hieronymus et al. criticized the review as inaccurate and misleading, but they also disclosed multiple ties to pharmaceutical industries and receipt of speaker's fees.<ref>{{cite journal | vauthors = Hieronymus F, Lisinski A, Näslund J, Eriksson E | title = Multiple possible inaccuracies cast doubt on a recent report suggesting selective serotonin reuptake inhibitors to be toxic and ineffective | journal = Acta Neuropsychiatrica | volume = 30 | issue = 5 | pages = 244–250 | pmid = 28718394 | doi = 10.1017/neu.2017.23 | year = 2018 | doi-access = free }}</ref> | ||
* In 2018, a systematic review and network meta-analysis comparing the efficacy and acceptability of 21 antidepressant drugs showed ] to be one of the most effective. They showed that "In terms of efficacy, all antidepressants were more effective than placebo, with ]s (ORs) ranging between 2.13 (95% credible interval 1.89–2.41) for amitriptyline and 1.37 (1.16–1.63) for reboxetine."<ref>{{cite journal | vauthors = Cipriani A, Furukawa TA, Salanti G, Chaimani A, Atkinson LZ, Ogawa Y, Leucht S, Ruhe HG, Turner EH, Higgins JP, Egger M, Takeshima N, Hayasaka Y, Imai H, Shinohara K, Tajika A, Ioannidis JP, Geddes JR | title = Comparative efficacy and acceptability of 21 antidepressant drugs for the acute treatment of adults with major depressive disorder: a systematic review and network meta-analysis | journal = Lancet | volume = 391 | issue = 10128 | pages = 1357–1366 | date = April 2018 | pmid = 29477251 | pmc = 5889788 | doi = 10.1016/S0140-6736(17)32802-7 }}</ref> | * In 2018, a systematic review and network meta-analysis comparing the efficacy and acceptability of 21 antidepressant drugs showed ] to be one of the most effective. They showed that "In terms of efficacy, all antidepressants were more effective than placebo, with ]s (ORs) ranging between 2.13 (95% credible interval 1.89–2.41) for amitriptyline and 1.37 (1.16–1.63) for reboxetine."<ref name="CiprianiFurukawaSalanti2018">{{cite journal | vauthors = Cipriani A, Furukawa TA, Salanti G, Chaimani A, Atkinson LZ, Ogawa Y, Leucht S, Ruhe HG, Turner EH, Higgins JP, Egger M, Takeshima N, Hayasaka Y, Imai H, Shinohara K, Tajika A, Ioannidis JP, Geddes JR | title = Comparative efficacy and acceptability of 21 antidepressant drugs for the acute treatment of adults with major depressive disorder: a systematic review and network meta-analysis | journal = Lancet | volume = 391 | issue = 10128 | pages = 1357–1366 | date = April 2018 | pmid = 29477251 | pmc = 5889788 | doi = 10.1016/S0140-6736(17)32802-7 }}</ref> The odds ratios were specifically in terms of ]s (≥50% reduction in observer-rated symptoms).<ref name="CiprianiFurukawaSalanti2018" /> Odds ratios of response rates have been criticized for artificially inflating the apparent size of antidepressant benefits.<ref name="KirschMoncrieff2007">{{cite journal | vauthors = Kirsch I, Moncrieff J | title = Clinical trials and the response rate illusion | journal = Contemp Clin Trials | volume = 28 | issue = 4 | pages = 348–351 | date = July 2007 | pmid = 17182286 | doi = 10.1016/j.cct.2006.10.012 | url = }}</ref><ref name="MoncrieffKirsch2015">{{cite journal | vauthors = Moncrieff J, Kirsch I | title = Empirically derived criteria cast doubt on the clinical significance of antidepressant-placebo differences | journal = Contemp Clin Trials | volume = 43 | issue = | pages = 60–2 | date = July 2015 | pmid = 25979317 | doi = 10.1016/j.cct.2015.05.005 | url = | quote = The commonly used method of estimating the ‘response’ to drug treatment in clinical trials of antidepressants (arbitrarily set at a 50% reduction in symptoms), involves the categorisation of continuous data from symptom scales, and therefore does not provide an independent arbiter of clinical significance. Moreover, this method can exaggerate small differences between interventions such as antidepressants and placebo , and statisticians note that it can distort data and should be avoided , . Response rates in double-blind antidepressant trials are typically about 50% in the drug groups and 35% in the placebo groups (e.g., , ). This 15% difference is often defended as clinically significant on the grounds that 15% of depressed people who get better on antidepressants would not have gotten better on placebo. However, a 50% reduction in symptoms is close to the mean and median of drug improvement rates in placebo-controlled antidepressant trials , , and thus near the apex of the distribution curve. Thus, with an SD of 8 in change scores, a 15% difference in response rates is about (an odds ratio of 1.86, a relative risk of 0.77, and an NNT of 7) is exactly what one would expect from a mean 3-point difference in HAM-D scores . Lack of response does not mean that the patient has not improved; it means that the improvement has been less, by as little as one point, than the arbitrary criterion chosen for defining a therapeutic response.}}</ref><ref name="Hengartner2017">{{cite journal | vauthors = Hengartner MP | title = Methodological Flaws, Conflicts of Interest, and Scientific Fallacies: Implications for the Evaluation of Antidepressants' Efficacy and Harm | journal = Front Psychiatry | volume = 8 | issue = | pages = 275 | date = 2017 | pmid = 29270136 | pmc = 5725408 | doi = 10.3389/fpsyt.2017.00275 | doi-access = free | url = | quote = Another common flaw is to report efficacy based on drug-placebo differences in response and remission rates (27). To come at binary constructs such as response and remission, continuous symptom rating scales are dichotomized along arbitrary cut-offs. However, methodologists have vigorously advised against the use of dichotomization (28–30) because it produces, among others, systematically inflated effect sizes (31–33).}}</ref> | ||
The use of SSRIs in children with depression remains controversial. A 2021 ] review concluded that, for children and adolescents, SSRIs "may reduce depression symptoms in a small and unimportant way compared with placebo."<ref>{{cite journal | vauthors = Hetrick SE, McKenzie JE, Bailey AP, Sharma V, Moller CI, Badcock PB, Cox GR, Merry SN, Meader N | title = New generation antidepressants for depression in children and adolescents: a network meta-analysis | journal = The Cochrane Database of Systematic Reviews | volume = 2021 | issue = 5 | pages = CD013674 | date = May 2021 | pmid = 34029378 | pmc = 8143444 | doi = 10.1002/14651858.CD013674.pub2 | collaboration = Cochrane Common Mental Disorders Group }}</ref> However, it also noted significant methodological limitations that make drawing definitive conclusions about efficacy difficult. ] is the only SSRI authorized for use in children and adolescents with moderate to severe depression in the ].<ref>{{cite web | url = http://www.nice.org.uk/guidance/ng134 | publisher = The National Institute for Health and Care Excellence (NICE) | title = Depression in children and young people: identification and management |website= NICE guideline NG134 | date = June 2019 }}</ref> | The use of SSRIs in children with depression remains controversial. A 2021 ] review concluded that, for children and adolescents, SSRIs "may reduce depression symptoms in a small and unimportant way compared with placebo."<ref>{{cite journal | vauthors = Hetrick SE, McKenzie JE, Bailey AP, Sharma V, Moller CI, Badcock PB, Cox GR, Merry SN, Meader N | title = New generation antidepressants for depression in children and adolescents: a network meta-analysis | journal = The Cochrane Database of Systematic Reviews | volume = 2021 | issue = 5 | pages = CD013674 | date = May 2021 | pmid = 34029378 | pmc = 8143444 | doi = 10.1002/14651858.CD013674.pub2 | collaboration = Cochrane Common Mental Disorders Group }}</ref> However, it also noted significant methodological limitations that make drawing definitive conclusions about efficacy difficult. ] is the only SSRI authorized for use in children and adolescents with moderate to severe depression in the ].<ref>{{cite web | url = http://www.nice.org.uk/guidance/ng134 | publisher = The National Institute for Health and Care Excellence (NICE) | title = Depression in children and young people: identification and management | website = NICE guideline NG134 | date = June 2019 | access-date = 2023-01-16 | archive-date = 2022-12-26 | archive-url = https://web.archive.org/web/20221226152142/https://www.nice.org.uk/guidance/ng134 | url-status = live }}</ref> | ||
===Social anxiety disorder=== | ===Social anxiety disorder=== | ||
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===Post-traumatic stress disorder=== | ===Post-traumatic stress disorder=== | ||
] is relatively hard to treat and generally treatment is not highly effective; SSRIs are no exception. They are not very effective for this disorder and only two |
] is relatively hard to treat and generally treatment is not highly effective; SSRIs are no exception. They are not very effective for this disorder and only two SSRIs are FDA approved for this condition: paroxetine and sertraline. Paroxetine has slightly higher response and remission rates for PTSD than sertraline, but both are not fully effective for many patients.{{Citation needed|date=November 2020}} Fluoxetine is used off-label, but with mixed results; venlafaxine, an SNRI, is considered somewhat effective, although its use is also off-label. Fluvoxamine, escitalopram and citalopram are not well tested in this disorder. Paroxetine remains the most suitable drug for PTSD as of now, but with limited benefits.<ref>{{cite journal | vauthors = Alexander W | title = Pharmacotherapy for Post-traumatic Stress Disorder In Combat Veterans: Focus on Antidepressants and Atypical Antipsychotic Agents | journal = P & T | volume = 37 | issue = 1 | pages = 32–38 | date = January 2012 | pmid = 22346334 | pmc = 3278188 }}</ref> | ||
===Generalized anxiety disorder=== | ===Generalized anxiety disorder=== | ||
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===Obsessive–compulsive disorder=== | ===Obsessive–compulsive disorder=== | ||
In Canada, SSRIs are a first-line treatment of adult ] (OCD). In the UK, they are first-line treatment only with moderate to severe functional impairment and as second line treatment for those with mild impairment, though, as of early 2019, this recommendation is being reviewed.<ref>{{cite journal | vauthors = Katzman MA, Bleau P, Blier P, Chokka P, Kjernisted K, Van Ameringen M, Antony MM, Bouchard S, Brunet A, Flament M, Grigoriadis S, Mendlowitz S, O'Connor K, Rabheru K, Richter PM, Robichaud M, Walker JR | title = Canadian clinical practice guidelines for the management of anxiety, posttraumatic stress and obsessive-compulsive disorders | journal = BMC Psychiatry | volume = 14 | issue = Suppl 1 | pages = S1 | date = 2014-07-02 | pmid = 25081580 | pmc = 4120194 | doi = 10.1186/1471-244X-14-S1-S1 | doi-access = free }}</ref> In children, SSRIs can be considered a second line therapy in those with moderate-to-severe impairment, with close monitoring for psychiatric adverse effects.<ref>{{cite web | url = http://www.nice.org.uk/nicemedia/pdf/cg031niceguideline.pdf | title = Obsessive-compulsive disorder: Core interventions in the treatment of obsessive-compulsive disorder and body dysmorphic disorder | date = November 2005 | access-date = 2013-02-24 | archive-date = 2008-12-06 | archive-url = https://web.archive.org/web/20081206033654/https://www.nice.org.uk/nicemedia/pdf/cg031niceguideline.pdf | url-status = dead }}</ref> SSRIs, especially ], which is the first one to be FDA approved for OCD, are efficacious in its treatment; patients treated with SSRIs are about twice as likely to respond to treatment as those treated with placebo.<ref>{{cite journal | vauthors = Arroll B, Elley CR, Fishman T, Goodyear-Smith FA, Kenealy T, Blashki G, Kerse N, Macgillivray S | title = Antidepressants versus placebo for depression in primary care | journal = The Cochrane Database of Systematic Reviews | volume = 2009 | issue = 3 | pages = CD007954 | date = July 2009 | pmid = 19588448 | doi = 10.1002/14651858.CD007954 | pmc = 10576545 | veditors = Arroll B }}</ref><ref>{{cite web| vauthors = Busko M |date=28 February 2008 |title=Review Finds SSRIs Modestly Effective in Short-Term Treatment of OCD |website=Medscape |url=http://www.medscape.com/viewarticle/570825+|url-status=dead |archive-url=https://web.archive.org/web/20130413110435/http://www.medscape.com/viewarticle/570825 |archive-date=April 13, 2013 }}</ref> Efficacy has been demonstrated both in short-term treatment trials of 6 to 24 weeks and in discontinuation trials of 28 to 52 weeks duration.<ref>{{cite journal | vauthors = Fineberg NA, Brown A, Reghunandanan S, Pampaloni I | title = Evidence-based pharmacotherapy of obsessive-compulsive disorder | journal = The International Journal of Neuropsychopharmacology | volume = 15 | issue = 8 | pages = 1173–1191 | date = September 2012 | pmid = 22226028 | doi = 10.1017/S1461145711001829 | doi-access = free | hdl = 2299/216 | hdl-access = free }}</ref><ref>{{cite web |url=http://www.accessdata.fda.gov/drugsatfda_docs/label/2009/019839s070,020990s032lbl.pdf |title=Sertraline prescribing information |access-date=2015-01-30 }}</ref><ref>{{cite web |url=https://www.apotex.com/us/en/products/downloads/pil/paxil_irtb_ins.pdf |title=Paroxetine prescribing information |access-date=2015-01-30 }}</ref> | In Canada, SSRIs are a first-line treatment of adult ] (OCD). In the UK, they are first-line treatment only with moderate to severe functional impairment and as second line treatment for those with mild impairment, though, as of early 2019, this recommendation is being reviewed.<ref>{{cite journal | vauthors = Katzman MA, Bleau P, Blier P, Chokka P, Kjernisted K, Van Ameringen M, Antony MM, Bouchard S, Brunet A, Flament M, Grigoriadis S, Mendlowitz S, O'Connor K, Rabheru K, Richter PM, Robichaud M, Walker JR | title = Canadian clinical practice guidelines for the management of anxiety, posttraumatic stress and obsessive-compulsive disorders | journal = BMC Psychiatry | volume = 14 | issue = Suppl 1 | pages = S1 | date = 2014-07-02 | pmid = 25081580 | pmc = 4120194 | doi = 10.1186/1471-244X-14-S1-S1 | doi-access = free }}</ref> In children, SSRIs can be considered a second line therapy in those with moderate-to-severe impairment, with close monitoring for psychiatric adverse effects.<ref>{{cite web | url = http://www.nice.org.uk/nicemedia/pdf/cg031niceguideline.pdf | title = Obsessive-compulsive disorder: Core interventions in the treatment of obsessive-compulsive disorder and body dysmorphic disorder | date = November 2005 | access-date = 2013-02-24 | archive-date = 2008-12-06 | archive-url = https://web.archive.org/web/20081206033654/https://www.nice.org.uk/nicemedia/pdf/cg031niceguideline.pdf | url-status = dead }}</ref> SSRIs, especially ], which is the first one to be FDA approved for OCD, are efficacious in its treatment; patients treated with SSRIs are about twice as likely to respond to treatment as those treated with placebo.<ref>{{cite journal | vauthors = Arroll B, Elley CR, Fishman T, Goodyear-Smith FA, Kenealy T, Blashki G, Kerse N, Macgillivray S | title = Antidepressants versus placebo for depression in primary care | journal = The Cochrane Database of Systematic Reviews | volume = 2009 | issue = 3 | pages = CD007954 | date = July 2009 | pmid = 19588448 | doi = 10.1002/14651858.CD007954 | pmc = 10576545 | veditors = Arroll B }}</ref><ref>{{cite web| vauthors = Busko M |date=28 February 2008 |title=Review Finds SSRIs Modestly Effective in Short-Term Treatment of OCD |website=Medscape |url=http://www.medscape.com/viewarticle/570825+|url-status=dead |archive-url=https://web.archive.org/web/20130413110435/http://www.medscape.com/viewarticle/570825 |archive-date=April 13, 2013 }}</ref> Efficacy has been demonstrated both in short-term treatment trials of 6 to 24 weeks and in discontinuation trials of 28 to 52 weeks duration.<ref>{{cite journal | vauthors = Fineberg NA, Brown A, Reghunandanan S, Pampaloni I | title = Evidence-based pharmacotherapy of obsessive-compulsive disorder | journal = The International Journal of Neuropsychopharmacology | volume = 15 | issue = 8 | pages = 1173–1191 | date = September 2012 | pmid = 22226028 | doi = 10.1017/S1461145711001829 | doi-access = free | hdl = 2299/216 | hdl-access = free }}</ref><ref>{{cite web |url=http://www.accessdata.fda.gov/drugsatfda_docs/label/2009/019839s070,020990s032lbl.pdf |title=Sertraline prescribing information |access-date=2015-01-30 |archive-date=2015-06-16 |archive-url=https://web.archive.org/web/20150616011817/http://www.accessdata.fda.gov/drugsatfda_docs/label/2009/019839s070%2C020990s032lbl.pdf |url-status=live }}</ref><ref>{{cite web |url=https://www.apotex.com/us/en/products/downloads/pil/paxil_irtb_ins.pdf |title=Paroxetine prescribing information |access-date=2015-01-30 |archive-date=2015-02-19 |archive-url=https://web.archive.org/web/20150219055046/https://www.apotex.com/us/en/products/downloads/pil/paxil_irtb_ins.pdf |url-status=live }}</ref> | ||
===Panic disorder=== | ===Panic disorder=== | ||
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===Eating disorders=== | ===Eating disorders=== | ||
Antidepressants are recommended as an alternative or additional first step to self-help programs in the treatment of ].<ref name="urlwww.nice.org.uk">{{cite web |url=http://www.nice.org.uk/nicemedia/pdf/CG9FullGuideline.pdf |title=Eating disorders in over 8s: management|date=January 2004 | |
Antidepressants are recommended as an alternative or additional first step to self-help programs in the treatment of ].<ref name="urlwww.nice.org.uk">{{cite web |url=http://www.nice.org.uk/nicemedia/pdf/CG9FullGuideline.pdf |title=Eating disorders in over 8s: management |date=January 2004 |website=Clinical guideline |publisher=The National Institute for Health and Care Excellence (NICE) |access-date=2013-03-02 |archive-date=2014-03-27 |archive-url=https://web.archive.org/web/20140327055429/http://www.nice.org.uk/nicemedia/pdf/CG9FullGuideline.pdf |url-status=live }}</ref> SSRIs (fluoxetine in particular) are preferred over other anti-depressants due to their acceptability, tolerability, and superior reduction of symptoms in short-term trials. Long-term efficacy remains poorly characterized. | ||
Similar recommendations apply to ].<ref name="urlwww.nice.org.uk" /> SSRIs provide short-term reductions in binge eating behavior, but have not been associated with significant weight loss.<ref name="urlNational Guideline Clearinghouse | Practice guideline for the treatment of patients with eating disorders.">{{cite web|url=http://www.guidelines.gov/content.aspx?id=9318+|title = Practice guideline for the treatment of patients with eating disorders |website=National Guideline Clearinghouse | publisher = U.S. Department of Health and Human Services |archive-url = https://web.archive.org/web/20130525135033/http://www.guidelines.gov/content.aspx?id=9318+ |archive-date=2013-05-25 |url-status=dead}}</ref> | Similar recommendations apply to ].<ref name="urlwww.nice.org.uk" /> SSRIs provide short-term reductions in binge eating behavior, but have not been associated with significant weight loss.<ref name="urlNational Guideline Clearinghouse | Practice guideline for the treatment of patients with eating disorders.">{{cite web|url=http://www.guidelines.gov/content.aspx?id=9318+|title = Practice guideline for the treatment of patients with eating disorders |website=National Guideline Clearinghouse | publisher = U.S. Department of Health and Human Services |archive-url = https://web.archive.org/web/20130525135033/http://www.guidelines.gov/content.aspx?id=9318+ |archive-date=2013-05-25 |url-status=dead}}</ref> | ||
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===Sexual dysfunction=== | ===Sexual dysfunction=== | ||
SSRIs can cause various types of ] such as ], ], diminished ], genital numbness, and ] (pleasureless orgasm).<ref name="Bahrick">{{cite journal| |
SSRIs can cause various types of ] such as ], ], diminished ], genital numbness, and ] (pleasureless orgasm).<ref name="Bahrick">{{cite journal|vauthors=Bahrick AS|year=2008|title=Persistence of Sexual Dysfunction Side Effects after Discontinuation of Antidepressant Medications: Emerging Evidence|url=https://benthamopen.com/ABSTRACT/TOPSYJ-1-42|journal=The Open Psychology Journal|volume=1|pages=42–50|doi=10.2174/1874350100801010042|doi-access=free|access-date=2021-04-15|archive-date=2021-04-15|archive-url=https://web.archive.org/web/20210415192602/https://benthamopen.com/ABSTRACT/TOPSYJ-1-42|url-status=live}}</ref> Sexual problems are common with SSRIs.<ref>{{cite journal | vauthors = Taylor MJ, Rudkin L, Bullemor-Day P, Lubin J, Chukwujekwu C, Hawton K | title = Strategies for managing sexual dysfunction induced by antidepressant medication | journal = The Cochrane Database of Systematic Reviews | volume = 5 | issue = 5 | pages = CD003382 | date = May 2013 | pmid = 23728643 | doi = 10.1002/14651858.CD003382.pub3 | doi-access = free }}</ref> Poor sexual function is one of the most common reasons people stop the medication.<ref>{{cite journal | vauthors = Kennedy SH, Rizvi S | title = Sexual dysfunction, depression, and the impact of antidepressants | journal = Journal of Clinical Psychopharmacology | volume = 29 | issue = 2 | pages = 157–164 | date = April 2009 | pmid = 19512977 | doi = 10.1097/jcp.0b013e31819c76e9 | s2cid = 739831 }}</ref> | ||
The mechanism by which SSRIs may cause sexual side effects is not well understood {{as of|2021|lc=1}}. The range of possible mechanisms includes (1) nonspecific neurological effects (e.g., sedation) that globally impair behavior including sexual function; (2) specific effects on brain systems mediating sexual function; (3) specific effects on peripheral tissues and organs, such as the penis, that mediate sexual function; and (4) direct or indirect effects on hormones mediating sexual function.<ref>{{cite journal | vauthors = Gitlin MJ | title = Psychotropic medications and their effects on sexual function: diagnosis, biology, and treatment approaches | journal = The Journal of Clinical Psychiatry | volume = 55 | issue = 9 | pages = 406–413 | date = September 1994 | pmid = 7929021 }}</ref> Management strategies include: for erectile dysfunction the addition of a ] such as ]; for decreased libido, possibly adding or switching to ]; and for overall sexual dysfunction, switching to ].<ref>{{cite journal | vauthors = Balon R | title = SSRI-Associated Sexual Dysfunction | journal = The American Journal of Psychiatry | volume = 163 | issue = 9 | pages = 1504–1509; quiz 1664 | year = 2006 | pmid = 16946173 | doi = 10.1176/appi.ajp.163.9.1504 }}</ref> ] is sometimes used off-label to reduce sexual dysfunction associated with the use of SSRIs.<ref name="Wilson 2023">{{cite journal |title=Buspirone |journal=StatPearls |date=17 January 2023 |pmid=30285372 |url=https://www.ncbi.nlm.nih.gov/books/NBK531477/ |vauthors=Wilson TK, Tripp J }}</ref><ref name="pmid34247952">{{cite journal |vauthors=Trinchieri M, Trinchieri M, Perletti G, Magri V, Stamatiou K, Cai T, Montanari E, Trinchieri A |title=Erectile and Ejaculatory Dysfunction Associated with Use of Psychotropic Drugs: A Systematic Review |journal=The Journal of Sexual Medicine |volume=18 |issue=8 |pages=1354–1363 |date=August 2021 |pmid=34247952 |doi=10.1016/j.jsxm.2021.05.016 |quote=Buspirone, a non-benzodiazepine anxiolytic, have even demonstrated enhancement of sexual function in certain individuals. For this reason, they have been proposed as augmentation agents (antidotes) or substitution agents in patients with emerging sexual dysfunction after treatment with antidepressants.}}</ref><ref name="pmid31591339">{{cite journal |vauthors=Montejo AL, Prieto N, de Alarcón R, Casado-Espada N, de la Iglesia J, Montejo L |title=Management Strategies for Antidepressant-Related Sexual Dysfunction: A Clinical Approach |journal=Journal of Clinical Medicine |volume=8 |issue=10 |date=October 2019 |page=1640 |pmid=31591339 |pmc=6832699 |doi=10.3390/jcm8101640|doi-access=free }}</ref> | The mechanism by which SSRIs may cause sexual side effects is not well understood {{as of|2021|lc=1}}. The range of possible mechanisms includes (1) nonspecific neurological effects (e.g., sedation) that globally impair behavior including sexual function; (2) specific effects on brain systems mediating sexual function; (3) specific effects on peripheral tissues and organs, such as the penis, that mediate sexual function; and (4) direct or indirect effects on hormones mediating sexual function.<ref>{{cite journal | vauthors = Gitlin MJ | title = Psychotropic medications and their effects on sexual function: diagnosis, biology, and treatment approaches | journal = The Journal of Clinical Psychiatry | volume = 55 | issue = 9 | pages = 406–413 | date = September 1994 | pmid = 7929021 }}</ref> Management strategies include: for erectile dysfunction the addition of a ] such as ]; for decreased libido, possibly adding or switching to ]; and for overall sexual dysfunction, switching to ].<ref>{{cite journal | vauthors = Balon R | title = SSRI-Associated Sexual Dysfunction | journal = The American Journal of Psychiatry | volume = 163 | issue = 9 | pages = 1504–1509; quiz 1664 | year = 2006 | pmid = 16946173 | doi = 10.1176/appi.ajp.163.9.1504 }}</ref> ] is sometimes used off-label to reduce sexual dysfunction associated with the use of SSRIs.<ref name="Wilson 2023">{{cite journal |title=Buspirone |journal=StatPearls |date=17 January 2023 |pmid=30285372 |url=https://www.ncbi.nlm.nih.gov/books/NBK531477/ |vauthors=Wilson TK, Tripp J |access-date=4 August 2024 |archive-date=11 August 2020 |archive-url=https://web.archive.org/web/20200811215632/https://www.ncbi.nlm.nih.gov/books/NBK531477/ |url-status=live }}</ref><ref name="pmid34247952">{{cite journal |vauthors=Trinchieri M, Trinchieri M, Perletti G, Magri V, Stamatiou K, Cai T, Montanari E, Trinchieri A |title=Erectile and Ejaculatory Dysfunction Associated with Use of Psychotropic Drugs: A Systematic Review |journal=The Journal of Sexual Medicine |volume=18 |issue=8 |pages=1354–1363 |date=August 2021 |pmid=34247952 |doi=10.1016/j.jsxm.2021.05.016 |quote=Buspirone, a non-benzodiazepine anxiolytic, have even demonstrated enhancement of sexual function in certain individuals. For this reason, they have been proposed as augmentation agents (antidotes) or substitution agents in patients with emerging sexual dysfunction after treatment with antidepressants.}}</ref><ref name="pmid31591339">{{cite journal |vauthors=Montejo AL, Prieto N, de Alarcón R, Casado-Espada N, de la Iglesia J, Montejo L |title=Management Strategies for Antidepressant-Related Sexual Dysfunction: A Clinical Approach |journal=Journal of Clinical Medicine |volume=8 |issue=10 |date=October 2019 |page=1640 |pmid=31591339 |pmc=6832699 |doi=10.3390/jcm8101640|doi-access=free }}</ref> | ||
A number of non-SSRI drugs are not associated with sexual side effects (such as ], ], ], ], ] and ]<ref>{{cite journal | vauthors = Serretti A, Chiesa A | title = Treatment-emergent sexual dysfunction related to antidepressants: a meta-analysis | journal = Journal of Clinical Psychopharmacology | volume = 29 | issue = 3 | pages = 259–266 | date = June 2009 | pmid = 19440080 | doi = 10.1097/JCP.0b013e3181a5233f | s2cid = 1663570 }}</ref><ref>{{cite journal | vauthors = Clayton AH |title=Antidepressant-Associated Sexual Dysfunction: A Potentially Avoidable Therapeutic Challenge |journal=Primary Psychiatry |volume=10 |issue=1 |pages=55–61 |year=2003 |url=http://www.primarypsychiatry.com/aspx/articledetail.aspx?articleid=1362 |access-date=2013-02-19 |archive-date=2020-06-04 |archive-url=https://web.archive.org/web/20200604183420/http://primarypsychiatry.com/antidepressant-associated-sexual-dysfunction-a-potentially-avoidable-therapeutic-challenge/ |url-status=dead }}</ref><ref>{{cite journal | vauthors = Kanaly KA, Berman JR | title = Sexual side effects of SSRI medications: potential treatment strategies for SSRI-induced female sexual dysfunction | journal = Current Women's Health Reports | volume = 2 | issue = 6 | pages = 409–416 | date = December 2002 | pmid = 12429073 }}</ref>). | A number of non-SSRI drugs are not associated with sexual side effects (such as ], ], ], ], ], and ]<ref>{{cite journal | vauthors = Serretti A, Chiesa A | title = Treatment-emergent sexual dysfunction related to antidepressants: a meta-analysis | journal = Journal of Clinical Psychopharmacology | volume = 29 | issue = 3 | pages = 259–266 | date = June 2009 | pmid = 19440080 | doi = 10.1097/JCP.0b013e3181a5233f | s2cid = 1663570 }}</ref><ref>{{cite journal | vauthors = Clayton AH |title=Antidepressant-Associated Sexual Dysfunction: A Potentially Avoidable Therapeutic Challenge |journal=Primary Psychiatry |volume=10 |issue=1 |pages=55–61 |year=2003 |url=http://www.primarypsychiatry.com/aspx/articledetail.aspx?articleid=1362 |access-date=2013-02-19 |archive-date=2020-06-04 |archive-url=https://web.archive.org/web/20200604183420/http://primarypsychiatry.com/antidepressant-associated-sexual-dysfunction-a-potentially-avoidable-therapeutic-challenge/ |url-status=dead }}</ref><ref>{{cite journal | vauthors = Kanaly KA, Berman JR | title = Sexual side effects of SSRI medications: potential treatment strategies for SSRI-induced female sexual dysfunction | journal = Current Women's Health Reports | volume = 2 | issue = 6 | pages = 409–416 | date = December 2002 | pmid = 12429073 }}</ref>). | ||
Several studies have suggested that SSRIs may adversely affect semen quality.<ref name="pmid36188547">{{cite journal |vauthors=Xu J, He K, Zhou Y, Zhao L, Lin Y, Huang Z, Xie N, Yue J, Tang Y |title=The effect of SSRIs on Semen quality: A systematic review and meta-analysis |journal=Frontiers in Pharmacology |volume=13 |issue= |pages=911489 |date=2022 |pmid=36188547 |pmc=9519136 |doi=10.3389/fphar.2022.911489|doi-access=free }}</ref><ref>{{cite journal |vauthors=Koyuncu H, Serefoglu EC, Ozdemir AT, Hellstrom WJ | title = Deleterious effects of selective serotonin reuptake inhibitor treatment on semen parameters in patients with lifelong premature ejaculation | journal = International Journal of Impotence Research| volume = 24 | issue = 5 | pages = 171–173 | date = September 2012 | pmid = 22573230 | doi = 10.1038/ijir.2012.12 | doi-access = free }}</ref> | Several studies have suggested that SSRIs may adversely affect semen quality.<ref name="pmid36188547">{{cite journal |vauthors=Xu J, He K, Zhou Y, Zhao L, Lin Y, Huang Z, Xie N, Yue J, Tang Y |title=The effect of SSRIs on Semen quality: A systematic review and meta-analysis |journal=Frontiers in Pharmacology |volume=13 |issue= |pages=911489 |date=2022 |pmid=36188547 |pmc=9519136 |doi=10.3389/fphar.2022.911489|doi-access=free }}</ref><ref>{{cite journal |vauthors=Koyuncu H, Serefoglu EC, Ozdemir AT, Hellstrom WJ | title = Deleterious effects of selective serotonin reuptake inhibitor treatment on semen parameters in patients with lifelong premature ejaculation | journal = International Journal of Impotence Research| volume = 24 | issue = 5 | pages = 171–173 | date = September 2012 | pmid = 22573230 | doi = 10.1038/ijir.2012.12 | doi-access = free }}</ref> | ||
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While ] (an antidepressant with ] blockade) is a notorious cause of ], cases of priapism have also been reported with certain SSRIs (e.g. fluoxetine, citalopram).<ref name="Scherzer et al 2019">{{cite journal | vauthors = Scherzer ND, Reddy AG, Le TV, Chernobylsky D, Hellstrom WJ | title = Unintended Consequences: A Review of Pharmacologically-Induced Priapism | journal = Sexual Medicine Reviews | volume = 7 | issue = 2 | pages = 283–292 | date = April 2019 | pmid = 30503727 | doi = 10.1016/j.sxmr.2018.09.002 | s2cid = 54621798 }}</ref> | While ] (an antidepressant with ] blockade) is a notorious cause of ], cases of priapism have also been reported with certain SSRIs (e.g. fluoxetine, citalopram).<ref name="Scherzer et al 2019">{{cite journal | vauthors = Scherzer ND, Reddy AG, Le TV, Chernobylsky D, Hellstrom WJ | title = Unintended Consequences: A Review of Pharmacologically-Induced Priapism | journal = Sexual Medicine Reviews | volume = 7 | issue = 2 | pages = 283–292 | date = April 2019 | pmid = 30503727 | doi = 10.1016/j.sxmr.2018.09.002 | s2cid = 54621798 }}</ref> | ||
==== Post-SSRI ==== | ==== Post-SSRI sexual dysfunction ==== | ||
Post-SSRI sexual dysfunction (PSSD)<ref name= Jannini2022>{{cite journal |vauthors=Jannini TB, Lorenzo GD, Bianciardi E, et al |title=Off-label Uses of Selective Serotonin Reuptake Inhibitors (SSRIs) |journal=Curr Neuropharmacol |volume=20 |issue=4 |pages=693–712 |date=2022 |pmid=33998993 |pmc=9878961 |doi=10.2174/1570159X19666210517150418 |type= Review}}</ref><ref name= Tarchi2023>{{cite journal |vauthors=Tarchi L, Merola GP, Baccaredda-Boy O, et al |title=Selective serotonin reuptake inhibitors, post-treatment sexual dysfunction and persistent genital arousal disorder: A systematic review |journal=Pharmacoepidemiol Drug Saf |volume= |
Post-SSRI sexual dysfunction (PSSD)<ref name= Jannini2022>{{cite journal |vauthors=Jannini TB, Lorenzo GD, Bianciardi E, et al |title=Off-label Uses of Selective Serotonin Reuptake Inhibitors (SSRIs) |journal=Curr Neuropharmacol |volume=20 |issue=4 |pages=693–712 |date=2022 |pmid=33998993 |pmc=9878961 |doi=10.2174/1570159X19666210517150418 |type= Review}}</ref><ref name= Tarchi2023>{{cite journal |vauthors=Tarchi L, Merola GP, Baccaredda-Boy O, et al |title=Selective serotonin reuptake inhibitors, post-treatment sexual dysfunction and persistent genital arousal disorder: A systematic review |journal=Pharmacoepidemiol Drug Saf |volume=32 |issue=10 |pages=1053–1067 |date=June 2023 |pmid=37294623 |doi=10.1002/pds.5653 |s2cid=259126886 |url=https://onlinelibrary.wiley.com/doi/10.1002/pds.5653 |type=Review |hdl=2158/1317239 |hdl-access=free |access-date=2023-08-15 |archive-date=2023-07-20 |archive-url=https://web.archive.org/web/20230720114319/https://onlinelibrary.wiley.com/doi/10.1002/pds.5653 |url-status=live }}</ref> refers to a set of symptoms reported by some people who have taken SSRIs or other ] (SRI) drugs, in which sexual dysfunction symptoms persist for at least three months<ref name= "Healy_2022"/><ref name="Chinchilla Alfaro_2022" /><ref name=Marks2023>{{cite journal |vauthors=Marks S |title=A clinical review of antidepressants, their sexual side-effects, post-SSRI sexual dysfunction, and serotonin syndrome |journal=Br J Nurs |volume=32 |issue=14 |pages=678–682 |date=July 2023 |pmid=37495413 |doi=10.12968/bjon.2023.32.14.678 |s2cid=260202178 |url=https://e-space.mmu.ac.uk/632844/13/BJON%20Final%20Proof%20%28Copyright%20Safe%29.pdf |access-date=2024-03-22 |archive-date=2024-03-22 |archive-url=https://web.archive.org/web/20240322212356/https://e-space.mmu.ac.uk/632844/13/BJON%20Final%20Proof%20(Copyright%20Safe).pdf |url-status=live }}</ref> after ceasing to take the drug. The status of PSSD as a legitimate and distinct pathology is contentious; several researchers have proposed that it should be recognized as a separate phenomenon from more common SSRI side effects.<ref name="Bala_2018_2" /> | ||
The reported symptoms of PSSD include reduced ] or ], ] in males or loss of ] in females, difficulty having an ] or loss of pleasurable sensation associated with orgasm, and a reduction or loss of sensitivity in the genitals or other ]s. Additional non-sexual symptoms are also commonly described, including ], ], ] or ], and ].<ref name="Healy_2022" /><ref name="Peleg_2022" /> The duration of PSSD symptoms appears to vary among patients, with some cases resolving in months and others in years or decades; one analysis of patient reports submitted between 1992 and 2021 in the ] listed a case which had reportedly persisted for 23 years.<ref name="Chinchilla Alfaro_2022">{{cite journal | vauthors = Chinchilla Alfaro K, van Hunsel F, Ekhart C | title = Persistent sexual dysfunction after SSRI withdrawal: a scoping review and presentation of 86 cases from the Netherlands | journal = Expert Opinion on Drug Safety | volume = 21 | issue = 4 | pages = 553–561 | date = April 2022 | pmid = 34791958 | doi = 10.1080/14740338.2022.2007883 | s2cid = 244347777 |type= Review}}</ref> The symptoms of PSSD are largely shared with ] and ], two other poorly-understood conditions which have been suggested to share a common etiology with PSSD despite being associated with different types of medication.<ref name="Giatti_2018">{{cite journal | vauthors = Giatti S, Diviccaro S, Panzica G, Melcangi RC | title = Post-finasteride syndrome and post-SSRI sexual dysfunction: two sides of the same coin? | journal = Endocrine | volume = 61 | issue = 2 | pages = 180–193 | date = August 2018 | pmid = 29675596 | doi = 10.1007/s12020-018-1593-5 | s2cid = 4974636 |type= Review}}</ref> | The reported symptoms of PSSD include reduced ] or ], ] in males or loss of ] in females, difficulty having an ] or loss of pleasurable sensation associated with orgasm, and a reduction or loss of sensitivity in the genitals or other ]s. Additional non-sexual symptoms are also commonly described, including ], ], ] or ], and ].<ref name="Healy_2022" /><ref name="Peleg_2022" /> The duration of PSSD symptoms appears to vary among patients, with some cases resolving in months and others in years or decades; one analysis of patient reports submitted between 1992 and 2021 in the ] listed a case which had reportedly persisted for 23 years.<ref name="Chinchilla Alfaro_2022">{{cite journal | vauthors = Chinchilla Alfaro K, van Hunsel F, Ekhart C | title = Persistent sexual dysfunction after SSRI withdrawal: a scoping review and presentation of 86 cases from the Netherlands | journal = Expert Opinion on Drug Safety | volume = 21 | issue = 4 | pages = 553–561 | date = April 2022 | pmid = 34791958 | doi = 10.1080/14740338.2022.2007883 | s2cid = 244347777 |type= Review}}</ref> The symptoms of PSSD are largely shared with ] and ], two other poorly-understood conditions which have been suggested to share a common etiology with PSSD despite being associated with different types of medication.<ref name="Giatti_2018">{{cite journal | vauthors = Giatti S, Diviccaro S, Panzica G, Melcangi RC | title = Post-finasteride syndrome and post-SSRI sexual dysfunction: two sides of the same coin? | journal = Endocrine | volume = 61 | issue = 2 | pages = 180–193 | date = August 2018 | pmid = 29675596 | doi = 10.1007/s12020-018-1593-5 | s2cid = 4974636 |type= Review}}</ref> | ||
Diagnostic criteria for PSSD were proposed in 2022,<ref name="Healy_2022">{{cite journal | vauthors = Healy D, Bahrick A, Bak M, Barbato A, Calabrò RS, Chubak BM, Cosci F, Csoka AB, D'Avanzo B, Diviccaro S, Giatti S, Goldstein I, Graf H, Hellstrom WJ, Irwig MS, Jannini EA, Janssen PK, Khera M, Kumar MT, Le Noury J, Lew-Starowicz M, Linden DE, Lüning C, Mangin D, Melcangi RC, Rodríguez OW, Panicker JN, Patacchini A, Pearlman AM, Pukall CF, Raj S, Reisman Y, Rubin RS, Schreiber R, Shipko S, Vašečková B, Waraich A | title = Diagnostic criteria for enduring sexual dysfunction after treatment with antidepressants, finasteride and isotretinoin | journal = The International Journal of Risk & Safety in Medicine | volume = 33 | issue = 1 | pages = 65–76 | date = 1 January 2022 | pmid = 34719438 | pmc = 8925105 | doi = 10.3233/JRS-210023 }}</ref> but as of 2023, there is no agreement on standards for diagnosis.<ref name= Tarchi2023/> It is considered a distinct phenomenon from ], ], and ],<ref name="Peleg_2022" /><ref name="Bala_2018_2">{{cite journal |vauthors=Bala A, Nguyen HM, Hellstrom WJ |date=January 2018 |title=Post-SSRI Sexual Dysfunction: A Literature Review |journal=Sexual Medicine Reviews |volume=6 |issue=1 |pages=29–34 |doi=10.1016/j.sxmr.2017.07.002 |pmid=28778697 |quote=There is still no definitive treatment for PSSD. Low-power laser irradiation and phototherapy have shown some promising results. |type= Review}}</ref> and should be distinguished from sexual dysfunction associated with ]<ref name="Peleg_2022" /> and ].<ref name= Tarchi2023/> There are limited treatment options for PSSD as of 2023 and no evidence that any individual approach is effective.<ref name= Tarchi2023/> The mechanism by which SRIs may induce PSSD is unclear;<ref name="Peleg_2022">{{cite journal |vauthors=Peleg LC, Rabinovitch D, Lavie Y, et al |title=Post-SSRI Sexual Dysfunction (PSSD): Biological Plausibility, Symptoms, Diagnosis, and Presumed Risk Factors |journal=Sex Med Rev |volume=10 |issue=1 |pages=91–98 |date=January 2022 |pmid=34627736 |doi=10.1016/j.sxmr.2021.07.001 |s2cid=238580777 |type=Review}}</ref> neurobiological and cognitive factors may act in combination to cause the problem.<ref name= Tarchi2023/> As of 2023, prevalence is unknown.<ref name= Tarchi2023/> A 2020 review stated that PSSD is rare, underreported, and "increasingly identified in online communities".<ref name=Rothmore2020>{{cite journal |vauthors=Rothmore J |title=Antidepressant-induced sexual dysfunction |journal=Med J Aust |volume=212 |issue=7 |pages=329–334 |date=April 2020 |pmid=32172535 |doi=10.5694/mja2.50522 |s2cid=212728659 |type= Review}}</ref> | Diagnostic criteria for PSSD were proposed in 2022,<ref name="Healy_2022">{{cite journal | vauthors = Healy D, Bahrick A, Bak M, Barbato A, Calabrò RS, Chubak BM, Cosci F, Csoka AB, D'Avanzo B, Diviccaro S, Giatti S, Goldstein I, Graf H, Hellstrom WJ, Irwig MS, Jannini EA, Janssen PK, Khera M, Kumar MT, Le Noury J, Lew-Starowicz M, Linden DE, Lüning C, Mangin D, Melcangi RC, Rodríguez OW, Panicker JN, Patacchini A, Pearlman AM, Pukall CF, Raj S, Reisman Y, Rubin RS, Schreiber R, Shipko S, Vašečková B, Waraich A | title = Diagnostic criteria for enduring sexual dysfunction after treatment with antidepressants, finasteride and isotretinoin | journal = The International Journal of Risk & Safety in Medicine | volume = 33 | issue = 1 | pages = 65–76 | date = 1 January 2022 | pmid = 34719438 | pmc = 8925105 | doi = 10.3233/JRS-210023 }}</ref> but as of 2023, there is no agreement on standards for diagnosis.<ref name= Tarchi2023/> It is considered a distinct phenomenon from ], ], and ],<ref name="Peleg_2022" /><ref name="Bala_2018_2">{{cite journal |vauthors=Bala A, Nguyen HM, Hellstrom WJ |date=January 2018 |title=Post-SSRI Sexual Dysfunction: A Literature Review |journal=Sexual Medicine Reviews |volume=6 |issue=1 |pages=29–34 |doi=10.1016/j.sxmr.2017.07.002 |pmid=28778697 |quote=There is still no definitive treatment for PSSD. Low-power laser irradiation and phototherapy have shown some promising results. |type= Review}}</ref> and should be distinguished from sexual dysfunction associated with ]<ref name="Peleg_2022" /> and ].<ref name= Tarchi2023/> There are limited treatment options for PSSD as of 2023 and no evidence that any individual approach is effective.<ref name= Tarchi2023/> The mechanism by which SRIs may induce PSSD is unclear;<ref name="Peleg_2022">{{cite journal |vauthors=Peleg LC, Rabinovitch D, Lavie Y, et al |title=Post-SSRI Sexual Dysfunction (PSSD): Biological Plausibility, Symptoms, Diagnosis, and Presumed Risk Factors |journal=Sex Med Rev |volume=10 |issue=1 |pages=91–98 |date=January 2022 |pmid=34627736 |doi=10.1016/j.sxmr.2021.07.001 |s2cid=238580777 |type=Review}}</ref> neurobiological and cognitive factors may act in combination to cause the problem.<ref name= Tarchi2023/> As of 2023, prevalence is unknown.<ref name= Tarchi2023/> A 2020 review stated that PSSD is rare, underreported, and "increasingly identified in online communities".<ref name=Rothmore2020>{{cite journal |vauthors=Rothmore J |title=Antidepressant-induced sexual dysfunction |journal=Med J Aust |volume=212 |issue=7 |pages=329–334 |date=April 2020 |pmid=32172535 |doi=10.5694/mja2.50522 |s2cid=212728659 |type= Review}}</ref> A 2024 study investigating the prevalence of persistent post-treatment genital numbness among sexual and gender minority youth found 13.2% of SSRI users between the ages 15 and 29 reporting the symptom compared to 0.9% who had used other medications.<ref>{{Cite journal |last=Pirani |first=Yassie |last2=Delgado-Ron |first2=J. Andrés |last3=Marinho |first3=Pedro |last4=Gupta |first4=Amit |last5=Grey |first5=Emily |last6=Watt |first6=Sarah |last7=MacKinnon |first7=Kinnon R. |last8=Salway |first8=Travis |date=2024-09-20 |title=Frequency of self-reported persistent post-treatment genital hypoesthesia among past antidepressant users: a cross-sectional survey of sexual and gender minority youth in Canada and the US |url=https://link.springer.com/article/10.1007/s00127-024-02769-0 |journal=Social Psychiatry and Psychiatric Epidemiology |language=en |doi=10.1007/s00127-024-02769-0 |issn=1433-9285}}</ref> | ||
Reports of PSSD have occurred with almost every SSRI (] is an exception).<ref name= Tarchi2023/> In 2019, the ] of the ] (EMA) recommended that packaging leaflets of selected SSRIs and ] should be amended to include information regarding a possible risk of persistent sexual dysfunction.<ref>{{cite book |url= https://www.ema.europa.eu/en/documents/prac-recommendation/prac-recommendations-signals-adopted-13-16-may-2019-prac-meeting_en.pdf |publisher= ] |date |
Reports of PSSD have occurred with almost every SSRI (] is an exception).<ref name= Tarchi2023/> In 2019, the ] of the ] (EMA) recommended that packaging leaflets of selected SSRIs and ] should be amended to include information regarding a possible risk of persistent sexual dysfunction.<ref>{{cite book |url= https://www.ema.europa.eu/en/documents/prac-recommendation/prac-recommendations-signals-adopted-13-16-may-2019-prac-meeting_en.pdf |publisher= ] |date= 11 June 2019 |title= PRAC recommendations on signals: Adopted at the 13-16 May 2019 PRAC meeting |page= 5 |access-date= 19 July 2023 |archive-date= 20 July 2023 |archive-url= https://web.archive.org/web/20230720114322/https://www.ema.europa.eu/en/documents/prac-recommendation/prac-recommendations-signals-adopted-13-16-may-2019-prac-meeting_en.pdf |url-status= live }}</ref> Following the EMA assessment, a safety review by ] "could neither confirm nor rule out a causal link{{nbs}}... which was long lasting in rare cases", but recommended that "healthcare professionals inform patients about the potential risk of long-lasting sexual dysfunction despite discontinuation of treatment".<ref name= HealthCanada>{{cite journal |title= SSRIs, SNRIs: risk of persistent sexual dysfunction |journal = Reactions Weekly |publisher= Springer |volume= 1838 |issue = 5 |date= 16 January 2021 |page = 5 |doi= 10.1007/s40278-021-89324-7|s2cid = 231669986 }}</ref> A 2023 review stated that ongoing sexual dysfunction after SSRI discontinuation was possible, but that cause and effect were undetermined.<ref name= Tarchi2023/> The 2023 review cautioned that reports of sexual dysfunction cannot be generalized to wider practice as they are subject to a "high risk of bias", but agreed with the EMA assessment that cautionary labeling on SSRIs was warranted.<ref name= Tarchi2023/> | ||
On the 20th of march of 2024, a lawsuit was filed by the organization ], representing ], against the ] (FDA) for failing to act on a citizen petition submitted in 2018. The petition seeks to have the risk of serious sexual side effects persisting after discontinuation mentioned in the product labels of SSRIs and SNRIs.<ref>{{Cite web |title=Csoka v. FDA |url=https://www.citizen.org/litigation/csoka-v-fda/ |access-date=2024-09-15 |website=Public Citizen |language=en}}</ref><ref>{{Cite web |date=2024-05-20 |title=FDA Sued Over Inaction on Citizen Petition |url=https://www.citizen.org/news/fda-sued-over-inaction-on-citizen-petition/ |access-date=2024-09-15 |website=Public Citizen |language=en}}</ref> | |||
===Emotional blunting=== | ===Emotional blunting=== | ||
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===Cardiac=== | ===Cardiac=== | ||
SSRIs do not appear to affect the risk of ] (CHD) in those without a previous diagnosis of CHD.<ref name="ohSWmeta2014">{{cite journal |vauthors=Oh SW, Kim J, Myung SK, Hwang SS, Yoon DH | title = Antidepressant Use and Risk of Coronary Heart Disease: Meta-Analysis of Observational Studies | journal = British Journal of Clinical Pharmacology | volume = 78 | issue = 4 | pages = 727–737 | date = Mar 20, 2014 | pmid = 24646010 | doi = 10.1111/bcp.12383 | pmc = 4239967 }}</ref> A large cohort study suggested no substantial increase in the risk of cardiac malformations attributable to SSRI usage during the first trimester of pregnancy.<ref name="HuybrechtsPalmsten2014">{{cite journal |vauthors=Huybrechts KF, Palmsten K, Avorn J, Cohen LS, Holmes LB, Franklin JM, Mogun H, Levin R, Kowal M, Setoguchi S, Hernández-Díaz S | title = Antidepressant Use in Pregnancy and the Risk of Cardiac Defects | journal = New England Journal of Medicine | volume = 370 | issue = 25 | pages = 2397–2407 | year = 2014 | pmid = 24941178 | doi = 10.1056/NEJMoa1312828 | pmc=4062924}}</ref> A number of large studies of people without known pre-existing heart disease have reported no ] changes related to SSRI use.<ref name="afpssri">{{cite journal | vauthors = Goldberg RJ | title = Selective serotonin reuptake inhibitors: infrequent medical adverse effects | journal = Archives of Family Medicine | volume = 7 | issue = 1 | pages = 78–84 | year = 1998 | pmid = 9443704 | doi = 10.1001/archfami.7.1.78 }}</ref> The recommended maximum daily dose of ] and ] was reduced due to concerns with ].<ref>{{cite journal|last=FDA|title=FDA Drug Safety|journal=FDA|url=https://www.fda.gov/Drugs/DrugSafety/ucm269086.htm|date=December 2018}}</ref><ref>. From ]. Article date: December 2011</ref><ref>{{cite web|url=http://m.utoledo.edu/med/gme/em/pdfs/ECG_escitalopram.pdf |title=Clinical and ECG Effects of Escitalopram Overdose |access-date=2012-09-23}}</ref> In overdose, fluoxetine has been reported to cause ], ], ]s and ]. Some authors have suggested ] monitoring in patients with severe pre-existing cardiovascular disease who are taking SSRIs.<ref>{{cite journal |vauthors=Pacher P, Ungvari Z, Nanasi PP, Furst S, Kecskemeti V | title = Speculations on difference between tricyclic and selective serotonin reuptake inhibitor antidepressants on their cardiac effects. Is there any? | journal = Current Medicinal Chemistry | volume = 6 | issue = 6 | pages = 469–480 | date = Jun 1999 | doi = 10.2174/0929867306666220330184544 | pmid = 10213794 | s2cid = 28057842 }}</ref> | SSRIs do not appear to affect the risk of ] (CHD) in those without a previous diagnosis of CHD.<ref name="ohSWmeta2014">{{cite journal |vauthors=Oh SW, Kim J, Myung SK, Hwang SS, Yoon DH | title = Antidepressant Use and Risk of Coronary Heart Disease: Meta-Analysis of Observational Studies | journal = British Journal of Clinical Pharmacology | volume = 78 | issue = 4 | pages = 727–737 | date = Mar 20, 2014 | pmid = 24646010 | doi = 10.1111/bcp.12383 | pmc = 4239967 }}</ref> A large cohort study suggested no substantial increase in the risk of cardiac malformations attributable to SSRI usage during the first trimester of pregnancy.<ref name="HuybrechtsPalmsten2014">{{cite journal |vauthors=Huybrechts KF, Palmsten K, Avorn J, Cohen LS, Holmes LB, Franklin JM, Mogun H, Levin R, Kowal M, Setoguchi S, Hernández-Díaz S | title = Antidepressant Use in Pregnancy and the Risk of Cardiac Defects | journal = New England Journal of Medicine | volume = 370 | issue = 25 | pages = 2397–2407 | year = 2014 | pmid = 24941178 | doi = 10.1056/NEJMoa1312828 | pmc=4062924}}</ref> A number of large studies of people without known pre-existing heart disease have reported no ] changes related to SSRI use.<ref name="afpssri">{{cite journal | vauthors = Goldberg RJ | title = Selective serotonin reuptake inhibitors: infrequent medical adverse effects | journal = Archives of Family Medicine | volume = 7 | issue = 1 | pages = 78–84 | year = 1998 | pmid = 9443704 | doi = 10.1001/archfami.7.1.78 }}</ref> The recommended maximum daily dose of ] and ] was reduced due to concerns with ].<ref>{{cite journal|last=FDA|title=FDA Drug Safety|journal=FDA|url=https://www.fda.gov/Drugs/DrugSafety/ucm269086.htm|date=December 2018|access-date=2019-12-16|archive-date=2020-10-10|archive-url=https://web.archive.org/web/20201010111755/https://www.fda.gov/drugs/drug-safety-and-availability/fda-drug-safety-communication-abnormal-heart-rhythms-associated-high-doses-celexa-citalopram/|url-status=live}}</ref><ref> {{Webarchive|url=https://web.archive.org/web/20130306065253/http://www.mhra.gov.uk/Safetyinformation/DrugSafetyUpdate/CON137769 |date=2013-03-06 }}. From ]. Article date: December 2011</ref><ref>{{cite web |url=http://m.utoledo.edu/med/gme/em/pdfs/ECG_escitalopram.pdf |title=Clinical and ECG Effects of Escitalopram Overdose |access-date=2012-09-23 |archive-date=2013-10-21 |archive-url=https://web.archive.org/web/20131021173824/http://m.utoledo.edu/med/gme/em/pdfs/ECG_escitalopram.pdf |url-status=live }}</ref> In overdose, fluoxetine has been reported to cause ], ], ]s, and ]. Some authors have suggested ] monitoring in patients with severe pre-existing cardiovascular disease who are taking SSRIs.<ref>{{cite journal |vauthors=Pacher P, Ungvari Z, Nanasi PP, Furst S, Kecskemeti V | title = Speculations on difference between tricyclic and selective serotonin reuptake inhibitor antidepressants on their cardiac effects. Is there any? | journal = Current Medicinal Chemistry | volume = 6 | issue = 6 | pages = 469–480 | date = Jun 1999 | doi = 10.2174/0929867306666220330184544 | pmid = 10213794 | s2cid = 28057842 }}</ref> | ||
In a 2023 study a possible connection between SSRI usage and the onset of ] was identified, indicating that SSRIs could hasten the progression of degenerative mitral valve regurgitation (DMR), especially in individuals carrying ] genotype. The study’s authors suggest that genotyping should be performed on people with DMR to evaluate serotonin transporter (SERT) activity. They also urge practitioners to exercise caution when prescribing SSRIs to individuals with a familial history of DMR.<ref>{{Cite web |title=Deciphering the Connection of Serotonin to Degenerative Mitral Valve Regurgitation - Advances in Cardiology and Heart Surgery |url=https://www.nyp.org/advances-cardiology/deciphering-the-connection-of-serotonin-to-degenerative-mitral-valve-regurgitation |access-date=2024-02-12 |website=NewYork-Presbyterian |language=en}}</ref><ref>{{Cite journal |last1=Castillero |first1=Estibaliz |last2=Fitzpatrick |first2=Emmett |last3=Keeney |first3=Samuel J. |last4=D'Angelo |first4=Alex M. |last5=Pressly |first5=Benjamin B. |last6=Simpson |first6=Michael T. |last7=Kurade |first7=Mangesh |last8=Erwin |first8=W. Clinton |last9=Moreno |first9=Vivian |last10=Camillo |first10=Chiara |last11=Shukla |first11=Halley J. |last12=Inamdar |first12=Vaishali V. |last13=Aghali |first13=Arbi |last14=Grau |first14=Juan B. |last15=Salvati |first15=Elisa |date=2023-01-04 |title=Decreased serotonin transporter activity in the mitral valve contributes to progression of degenerative mitral regurgitation |journal=Science Translational Medicine |language=en |volume=15 |issue=677 |pages=eadc9606 |doi=10.1126/scitranslmed.adc9606 |issn=1946-6234 |pmc=9896655 |pmid=36599005}}</ref><ref>{{Cite web |date=2023-01-29 |title=Serotonin can potentially accelerate degenerative mitral regurgitation, study says |url=https://www.news-medical.net/news/20230129/Serotonin-can-potentially-accelerate-degenerative-mitral-regurgitation-study-says.aspx |access-date=2024-02-12 |website=News-Medical |language=en}}</ref> | In a 2023 study a possible connection between SSRI usage and the onset of ] was identified, indicating that SSRIs could hasten the progression of degenerative mitral valve regurgitation (DMR), especially in individuals carrying ] genotype. The study’s authors suggest that genotyping should be performed on people with DMR to evaluate serotonin transporter (SERT) activity. They also urge practitioners to exercise caution when prescribing SSRIs to individuals with a familial history of DMR.<ref>{{Cite web |title=Deciphering the Connection of Serotonin to Degenerative Mitral Valve Regurgitation - Advances in Cardiology and Heart Surgery |url=https://www.nyp.org/advances-cardiology/deciphering-the-connection-of-serotonin-to-degenerative-mitral-valve-regurgitation |access-date=2024-02-12 |website=NewYork-Presbyterian |language=en |archive-date=2024-02-12 |archive-url=https://web.archive.org/web/20240212185502/https://www.nyp.org/advances-cardiology/deciphering-the-connection-of-serotonin-to-degenerative-mitral-valve-regurgitation |url-status=live }}</ref><ref>{{Cite journal |last1=Castillero |first1=Estibaliz |last2=Fitzpatrick |first2=Emmett |last3=Keeney |first3=Samuel J. |last4=D'Angelo |first4=Alex M. |last5=Pressly |first5=Benjamin B. |last6=Simpson |first6=Michael T. |last7=Kurade |first7=Mangesh |last8=Erwin |first8=W. Clinton |last9=Moreno |first9=Vivian |last10=Camillo |first10=Chiara |last11=Shukla |first11=Halley J. |last12=Inamdar |first12=Vaishali V. |last13=Aghali |first13=Arbi |last14=Grau |first14=Juan B. |last15=Salvati |first15=Elisa |date=2023-01-04 |title=Decreased serotonin transporter activity in the mitral valve contributes to progression of degenerative mitral regurgitation |journal=Science Translational Medicine |language=en |volume=15 |issue=677 |pages=eadc9606 |doi=10.1126/scitranslmed.adc9606 |issn=1946-6234 |pmc=9896655 |pmid=36599005}}</ref><ref>{{Cite web |date=2023-01-29 |title=Serotonin can potentially accelerate degenerative mitral regurgitation, study says |url=https://www.news-medical.net/news/20230129/Serotonin-can-potentially-accelerate-degenerative-mitral-regurgitation-study-says.aspx |access-date=2024-02-12 |website=News-Medical |language=en |archive-date=2024-02-12 |archive-url=https://web.archive.org/web/20240212190502/https://www.news-medical.net/news/20230129/Serotonin-can-potentially-accelerate-degenerative-mitral-regurgitation-study-says.aspx |url-status=live }}</ref> | ||
===Bleeding=== | ===Bleeding=== | ||
Line 109: | Line 112: | ||
===Fracture risk=== | ===Fracture risk=== | ||
Evidence from longitudinal, cross-sectional, and prospective cohort studies suggests an association between SSRI usage at therapeutic doses and a decrease in bone mineral density, as well as increased fracture risk,<ref>{{cite journal | vauthors = Eom CS, Lee HK, Ye S, Park SM, Cho KH | title = Use of selective serotonin reuptake inhibitors and risk of fracture: a systematic review and meta-analysis | journal = Journal of Bone and Mineral Research | volume = 27 | issue = 5 | pages = 1186–1195 | date = May 2012 | pmid = 22258738 | doi = 10.1002/jbmr.1554 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Bruyère O, Reginster JY | title = Osteoporosis in patients taking selective serotonin reuptake inhibitors: a focus on fracture outcome | journal = Endocrine | volume = 48 | issue = 1 | pages = 65–68 | date = February 2015 | pmid = 25091520 | doi = 10.1007/s12020-014-0357-0 | s2cid = 32286954 | url = https://zenodo.org/record/845248 }}</ref><ref>{{cite journal | vauthors = Hant FN, Bolster MB | title = Drugs that may harm bone: Mitigating the risk | journal = Cleveland Clinic Journal of Medicine | volume = 83 | issue = 4 | pages = 281–288 | date = April 2016 | pmid = 27055202 | doi = 10.3949/ccjm.83a.15066 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Fernandes BS, Hodge JM, Pasco JA, Berk M, Williams LJ | title = Effects of Depression and Serotonergic Antidepressants on Bone: Mechanisms and Implications for the Treatment of Depression | journal = Drugs & Aging | volume = 33 | issue = 1 | pages = 21–25 | date = January 2016 | pmid = 26547857 | doi = 10.1007/s40266-015-0323-4 | s2cid = 7648524 }}</ref> a relationship that appears to persist even with adjuvant ] therapy.<ref>{{cite journal | vauthors = Nyandege AN, Slattum PW, Harpe SE | title = Risk of fracture and the concomitant use of bisphosphonates with osteoporosis-inducing medications | journal = The Annals of Pharmacotherapy | volume = 49 | issue = 4 | pages = 437–447 | date = April 2015 | pmid = 25667198 | doi = 10.1177/1060028015569594 | s2cid = 20622369 }}</ref> However, because the relationship between SSRIs and fractures is based on observational data as opposed to prospective trials, the phenomenon is not definitively causal.<ref name="falls">{{cite journal | vauthors = Warden SJ, Fuchs RK | title = Do Selective Serotonin Reuptake Inhibitors (SSRIs) Cause Fractures? | journal = Current Osteoporosis Reports | volume = 14 | issue = 5 | pages = 211–218 | date = October 2016 | pmid = 27495351 | doi = 10.1007/s11914-016-0322-3 | s2cid = 5610316 }}</ref> There also appears to be an increase in fracture-inducing falls with SSRI use, suggesting the need for increased attention to fall risk in elderly patients using the medication.<ref name="falls"/> The loss of bone density does not appear to occur in younger patients taking SSRIs.<ref>{{cite journal | vauthors = Winterhalder L, Eser P, Widmer J, Villiger PM, Aeberli D | title = Changes in volumetric BMD of radius and tibia upon antidepressant drug administration in young depressive patients | journal = Journal of Musculoskeletal & Neuronal Interactions | volume = 12 | issue = 4 | pages = 224–229 | date = December 2012 | pmid = 23196265 }}</ref> | Evidence from longitudinal, cross-sectional, and prospective cohort studies suggests an association between SSRI usage at therapeutic doses and a decrease in bone mineral density, as well as increased fracture risk,<ref>{{cite journal | vauthors = Eom CS, Lee HK, Ye S, Park SM, Cho KH | title = Use of selective serotonin reuptake inhibitors and risk of fracture: a systematic review and meta-analysis | journal = Journal of Bone and Mineral Research | volume = 27 | issue = 5 | pages = 1186–1195 | date = May 2012 | pmid = 22258738 | doi = 10.1002/jbmr.1554 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Bruyère O, Reginster JY | title = Osteoporosis in patients taking selective serotonin reuptake inhibitors: a focus on fracture outcome | journal = Endocrine | volume = 48 | issue = 1 | pages = 65–68 | date = February 2015 | pmid = 25091520 | doi = 10.1007/s12020-014-0357-0 | s2cid = 32286954 | url = https://zenodo.org/record/845248 | access-date = 2019-07-01 | archive-date = 2020-10-10 | archive-url = https://web.archive.org/web/20201010111808/https://zenodo.org/record/845248/ | url-status = live }}</ref><ref>{{cite journal | vauthors = Hant FN, Bolster MB | title = Drugs that may harm bone: Mitigating the risk | journal = Cleveland Clinic Journal of Medicine | volume = 83 | issue = 4 | pages = 281–288 | date = April 2016 | pmid = 27055202 | doi = 10.3949/ccjm.83a.15066 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Fernandes BS, Hodge JM, Pasco JA, Berk M, Williams LJ | title = Effects of Depression and Serotonergic Antidepressants on Bone: Mechanisms and Implications for the Treatment of Depression | journal = Drugs & Aging | volume = 33 | issue = 1 | pages = 21–25 | date = January 2016 | pmid = 26547857 | doi = 10.1007/s40266-015-0323-4 | s2cid = 7648524 }}</ref> a relationship that appears to persist even with adjuvant ] therapy.<ref>{{cite journal | vauthors = Nyandege AN, Slattum PW, Harpe SE | title = Risk of fracture and the concomitant use of bisphosphonates with osteoporosis-inducing medications | journal = The Annals of Pharmacotherapy | volume = 49 | issue = 4 | pages = 437–447 | date = April 2015 | pmid = 25667198 | doi = 10.1177/1060028015569594 | s2cid = 20622369 }}</ref> However, because the relationship between SSRIs and fractures is based on observational data as opposed to prospective trials, the phenomenon is not definitively causal.<ref name="falls">{{cite journal | vauthors = Warden SJ, Fuchs RK | title = Do Selective Serotonin Reuptake Inhibitors (SSRIs) Cause Fractures? | journal = Current Osteoporosis Reports | volume = 14 | issue = 5 | pages = 211–218 | date = October 2016 | pmid = 27495351 | doi = 10.1007/s11914-016-0322-3 | s2cid = 5610316 }}</ref> There also appears to be an increase in fracture-inducing falls with SSRI use, suggesting the need for increased attention to fall risk in elderly patients using the medication.<ref name="falls"/> The loss of bone density does not appear to occur in younger patients taking SSRIs.<ref>{{cite journal | vauthors = Winterhalder L, Eser P, Widmer J, Villiger PM, Aeberli D | title = Changes in volumetric BMD of radius and tibia upon antidepressant drug administration in young depressive patients | journal = Journal of Musculoskeletal & Neuronal Interactions | volume = 12 | issue = 4 | pages = 224–229 | date = December 2012 | pmid = 23196265 }}</ref> | ||
=== Bruxism === | === Bruxism === | ||
] and ] antidepressants may cause jaw pain/jaw spasm reversible syndrome (although it is not common). Buspirone appears to be successful in treating ] on SSRI/SNRI induced jaw clenching.<ref>{{cite journal | vauthors = Garrett AR, Hawley JS | title = SSRI-associated bruxism: A systematic review of published case reports | journal = Neurology. Clinical Practice | volume = 8 | issue = 2 | pages = 135–141 | date = April 2018 | pmid = 29708207 | pmc = 5914744 | doi = 10.1212/CPJ.0000000000000433 }}</ref><ref>{{cite journal | vauthors = Prisco V, Iannaccone T, Di Grezia G | date = 2017-04-01 | title = Use of buspirone in selective serotonin reuptake inhibitor-induced sleep bruxism | url = http://www.sciencedirect.com/science/article/pii/S0924933817317169 | journal = European Psychiatry | series = Abstract of the 25th European Congress of Psychiatry | volume = 41 | pages = S855 | doi = 10.1016/j.eurpsy.2017.01.1701 | s2cid = 148816505 | issn = 0924-9338 }}</ref><ref>{{cite journal | vauthors = Albayrak Y, Ekinci O | title = Duloxetine-induced nocturnal bruxism resolved by buspirone: case report | journal = Clinical Neuropharmacology | volume = 34 | issue = 4 | pages = 137–138 | year = 2011 | pmid = 21768799 | doi = 10.1097/WNF.0b013e3182227736 }}</ref> | ] and ] antidepressants may cause jaw pain/jaw spasm reversible syndrome (although it is not common). Buspirone appears to be successful in treating ] on SSRI/SNRI induced jaw clenching.<ref>{{cite journal | vauthors = Garrett AR, Hawley JS | title = SSRI-associated bruxism: A systematic review of published case reports | journal = Neurology. Clinical Practice | volume = 8 | issue = 2 | pages = 135–141 | date = April 2018 | pmid = 29708207 | pmc = 5914744 | doi = 10.1212/CPJ.0000000000000433 }}</ref><ref>{{cite journal | vauthors = Prisco V, Iannaccone T, Di Grezia G | date = 2017-04-01 | title = Use of buspirone in selective serotonin reuptake inhibitor-induced sleep bruxism | url = http://www.sciencedirect.com/science/article/pii/S0924933817317169 | journal = European Psychiatry | series = Abstract of the 25th European Congress of Psychiatry | volume = 41 | pages = S855 | doi = 10.1016/j.eurpsy.2017.01.1701 | s2cid = 148816505 | issn = 0924-9338 | access-date = 2020-04-18 | archive-date = 2020-10-10 | archive-url = https://web.archive.org/web/20201010111724/https://www.sciencedirect.com/science/article/abs/pii/S0924933817317169/ | url-status = live }}</ref><ref>{{cite journal | vauthors = Albayrak Y, Ekinci O | title = Duloxetine-induced nocturnal bruxism resolved by buspirone: case report | journal = Clinical Neuropharmacology | volume = 34 | issue = 4 | pages = 137–138 | year = 2011 | pmid = 21768799 | doi = 10.1097/WNF.0b013e3182227736 }}</ref> | ||
=== Serotonin syndrome === | === Serotonin syndrome === | ||
{{Main|Serotonin syndrome}} | {{Main|Serotonin syndrome}} | ||
Serotonin syndrome is typically caused by the use of two or more ] drugs, including SSRIs.<ref>{{cite journal | vauthors = Volpi-Abadie J, Kaye AM, Kaye AD | title = Serotonin syndrome | journal = The Ochsner Journal | volume = 13 | issue = 4 | pages = 533–540 | date = 2013 | pmid = 24358002 | pmc = 3865832 }}</ref> ] is a condition that can range from mild (most common) to deadly. Mild symptoms may consist of ], ], shivering, ], ]s, ] (intermittent jerking or twitching), as well as ].<ref>{{cite journal | vauthors = Boyer EW, Shannon M | title = The serotonin syndrome | journal = The New England Journal of Medicine | volume = 352 | issue = 11 | pages = 1112–1120 | date = March 2005 | pmid = 15784664 | doi = 10.1056/nejmra041867 | s2cid = 37959124 }}</ref> Concomitant use of SSRIs or SNRIs for depression with a ] for ] does not appear to heighten the risk of the serotonin syndrome.<ref name="pmid29482205">{{cite journal | vauthors = Orlova Y, Rizzoli P, Loder E | title = Association of Coprescription of Triptan Antimigraine Drugs and Selective Serotonin Reuptake Inhibitor or Selective Norepinephrine Reuptake Inhibitor Antidepressants With Serotonin Syndrome | journal = JAMA Neurology | volume = 75 | issue = 5 | pages = 566–572 | date = May 2018 | pmid = 29482205 | pmc = 5885255 | doi = 10.1001/jamaneurol.2017.5144 }}</ref> Taking ]s (MAOIs) in combination with SSRIs can be fatal, since MAOIs disrupt ], an enzyme which is needed to break down serotonin and other neurotransmitters. Without monoamine oxidase, the body is unable to eliminate excess neurotransmitters, allowing them to build up to dangerous levels. The prognosis for recovery in a hospital setting is generally good if serotonin syndrome is correctly identified. Treatment consists of discontinuing any serotonergic drugs and providing supportive care to manage ] and ], usually with ]s.<ref name=Fer2016>{{cite book| |
Serotonin syndrome is typically caused by the use of two or more ] drugs, including SSRIs.<ref>{{cite journal | vauthors = Volpi-Abadie J, Kaye AM, Kaye AD | title = Serotonin syndrome | journal = The Ochsner Journal | volume = 13 | issue = 4 | pages = 533–540 | date = 2013 | pmid = 24358002 | pmc = 3865832 }}</ref> ] is a condition that can range from mild (most common) to deadly. Mild symptoms may consist of ], ], shivering, ], ]s, ] (intermittent jerking or twitching), as well as ].<ref>{{cite journal | vauthors = Boyer EW, Shannon M | title = The serotonin syndrome | journal = The New England Journal of Medicine | volume = 352 | issue = 11 | pages = 1112–1120 | date = March 2005 | pmid = 15784664 | doi = 10.1056/nejmra041867 | s2cid = 37959124 }}</ref> Concomitant use of SSRIs or SNRIs for depression with a ] for ] does not appear to heighten the risk of the serotonin syndrome.<ref name="pmid29482205">{{cite journal | vauthors = Orlova Y, Rizzoli P, Loder E | title = Association of Coprescription of Triptan Antimigraine Drugs and Selective Serotonin Reuptake Inhibitor or Selective Norepinephrine Reuptake Inhibitor Antidepressants With Serotonin Syndrome | journal = JAMA Neurology | volume = 75 | issue = 5 | pages = 566–572 | date = May 2018 | pmid = 29482205 | pmc = 5885255 | doi = 10.1001/jamaneurol.2017.5144 }}</ref> Taking ]s (MAOIs) in combination with SSRIs can be fatal, since MAOIs disrupt ], an enzyme which is needed to break down serotonin and other neurotransmitters. Without monoamine oxidase, the body is unable to eliminate excess neurotransmitters, allowing them to build up to dangerous levels. The prognosis for recovery in a hospital setting is generally good if serotonin syndrome is correctly identified. Treatment consists of discontinuing any serotonergic drugs and providing supportive care to manage ] and ], usually with ]s.<ref name=Fer2016>{{cite book|vauthors=Ferri FF|title=Ferri's Clinical Advisor 2017: 5 Books in 1|date=2016|publisher=Elsevier Health Sciences|isbn=978-0-323-44838-3|pages=1154–1155|url=https://books.google.com/books?id=rRhCDAAAQBAJ&pg=PA1154|language=en|access-date=2021-01-26|archive-date=2023-01-14|archive-url=https://web.archive.org/web/20230114060907/https://books.google.com/books?id=rRhCDAAAQBAJ&pg=PA1154|url-status=live}}</ref> | ||
===Suicide risk=== | ===Suicide risk=== | ||
====Children and adolescents==== | ====Children and adolescents==== | ||
Meta analyses of short duration randomized clinical trials have found that SSRI use is related to a higher risk of suicidal behavior in children and adolescents.<ref name =FDA2>{{cite web| url = https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | title =Clinical review: relationship between antidepressant drugs and suicidal behavior in adults| access-date = 2007-09-22 |vauthors=Stone MB, Jones ML | date = 2006-11-17| website = Overview for December 13 Meeting of Psychopharmacologic Drugs Advisory Committee (PDAC) | publisher = FDA| pages = 11–74}}</ref><ref name =FDA3>{{cite web| url = https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | title = Statistical Evaluation of Suicidality in Adults Treated with Antidepressants | access-date = 2007-09-22 |vauthors=Levenson M, Holland C | date = 2006-11-17| website =Overview for December 13 Meeting of Psychopharmacologic Drugs Advisory Committee (PDAC) | publisher = FDA| pages = 75–140}}</ref><ref name = "Olfson">{{cite journal | vauthors = Olfson M, Marcus SC, Shaffer D | title = Antidepressant drug therapy and suicide in severely depressed children and adults: A case-control study | journal = Archives of General Psychiatry | volume = 63 | issue = 8 | pages = 865–872 | date = August 2006 | pmid = 16894062 | doi = 10.1001/archpsyc.63.8.865 | doi-access = free }}</ref> For instance, a 2004 ] (FDA) analysis of ]s on children with ] found statistically significant increases of the risks of "possible ] and suicidal behavior" by about 80%, and of agitation and hostility by about 130%.<ref name=FDA>{{cite web| url = https://www.fda.gov/OHRMS/DOCKETS/ac/04/briefing/2004-4065b1-10-TAB08-Hammads-Review.pdf | title = Review and evaluation of clinical data. Relationship between psychiatric drugs and pediatric suicidal behavior | access-date = 2008-05-29 | vauthors = Hammad TA | date = 2004-08-16| publisher = FDA| pages = 42, 115}}</ref> According to the FDA, the heightened risk of suicidality is within the first one to two months of treatment.<ref>{{cite web |url=https://www.fda.gov/drugs/drugsafety/informationbydrugclass/ucm096273 | archive-url = https://web.archive.org/web/20170107043034/https://www.fda.gov/drugs/drugsafety/informationbydrugclass/ucm096273 | archive-date = 7 January 2017 | url-status = dead | publisher = U.S. Food and Drug Administration |title=Antidepressant Use in Children, Adolescents, and Adults }}</ref><ref>{{cite web |url=https://www.fda.gov/downloads/Drugs/DrugSafety/ucm088660.pdf%E2%80%8E |title=FDA Medication Guide for Antidepressants |website=] |access-date=2014-06-05 }}</ref><ref name=":1">{{cite journal | vauthors = Cox GR, Callahan P, Churchill R, Hunot V, Merry SN, Parker AG, Hetrick SE | title = Psychological therapies versus antidepressant medication, alone and in combination for depression in children and adolescents | journal = The Cochrane Database of Systematic Reviews | issue = 11 | pages = CD008324 | date = November 2014 | volume = 2014 | pmid = 25433518 | doi = 10.1002/14651858.CD008324.pub3 | pmc = 8556660 }}</ref> The National Institute for Health and Care Excellence (NICE) places the excess risk in the "early stages of treatment".<ref>{{cite web|url=https://www.nice.org.uk/guidance/CG90|title=Overview | Depression in adults: recognition and management | Guidance | NICE|website=www.nice.org.uk|date=28 October 2009 }}</ref> The European Psychiatric Association places the excess risk in the first two weeks of treatment and, based on a combination of epidemiological, prospective cohort, medical claims, and randomized clinical trial data, concludes that a protective effect dominates after this early period. A 2014 Cochrane review found that at six to nine months, suicidal ideation remained higher in children treated with antidepressants compared to those treated with psychological therapy.<ref name=":1" /> | Meta analyses of short duration randomized clinical trials have found that SSRI use is related to a higher risk of suicidal behavior in children and adolescents.<ref name =FDA2>{{cite web | url = https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | title = Clinical review: relationship between antidepressant drugs and suicidal behavior in adults | access-date = 2007-09-22 | vauthors = Stone MB, Jones ML | date = 2006-11-17 | website = Overview for December 13 Meeting of Psychopharmacologic Drugs Advisory Committee (PDAC) | publisher = FDA | pages = 11–74 | archive-date = 2007-03-16 | archive-url = https://web.archive.org/web/20070316092329/https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | url-status = live }}</ref><ref name =FDA3>{{cite web | url = https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | title = Statistical Evaluation of Suicidality in Adults Treated with Antidepressants | access-date = 2007-09-22 | vauthors = Levenson M, Holland C | date = 2006-11-17 | website = Overview for December 13 Meeting of Psychopharmacologic Drugs Advisory Committee (PDAC) | publisher = FDA | pages = 75–140 | archive-date = 2007-03-16 | archive-url = https://web.archive.org/web/20070316092329/https://www.fda.gov/ohrms/dockets/ac/06/briefing/2006-4272b1-01-FDA.pdf | url-status = live }}</ref><ref name = "Olfson">{{cite journal | vauthors = Olfson M, Marcus SC, Shaffer D | title = Antidepressant drug therapy and suicide in severely depressed children and adults: A case-control study | journal = Archives of General Psychiatry | volume = 63 | issue = 8 | pages = 865–872 | date = August 2006 | pmid = 16894062 | doi = 10.1001/archpsyc.63.8.865 | doi-access = free }}</ref> For instance, a 2004 ] (FDA) analysis of ]s on children with ] found statistically significant increases of the risks of "possible ] and suicidal behavior" by about 80%, and of agitation and hostility by about 130%.<ref name=FDA>{{cite web | url = https://www.fda.gov/OHRMS/DOCKETS/ac/04/briefing/2004-4065b1-10-TAB08-Hammads-Review.pdf | title = Review and evaluation of clinical data. Relationship between psychiatric drugs and pediatric suicidal behavior | access-date = 2008-05-29 | vauthors = Hammad TA | date = 2004-08-16 | publisher = FDA | pages = 42, 115 | archive-date = 2008-06-25 | archive-url = https://web.archive.org/web/20080625161255/https://www.fda.gov/OHRMS/DOCKETS/ac/04/briefing/2004-4065b1-10-TAB08-Hammads-Review.pdf | url-status = live }}</ref> According to the FDA, the heightened risk of suicidality is within the first one to two months of treatment.<ref>{{cite web |url=https://www.fda.gov/drugs/drugsafety/informationbydrugclass/ucm096273 | archive-url = https://web.archive.org/web/20170107043034/https://www.fda.gov/drugs/drugsafety/informationbydrugclass/ucm096273 | archive-date = 7 January 2017 | url-status = dead | publisher = U.S. Food and Drug Administration |title=Antidepressant Use in Children, Adolescents, and Adults }}</ref><ref>{{cite web |url=https://www.fda.gov/downloads/Drugs/DrugSafety/ucm088660.pdf%E2%80%8E |title=FDA Medication Guide for Antidepressants |website=] |access-date=2014-06-05 |archive-date=2014-08-18 |archive-url=https://web.archive.org/web/20140818020916/https://www.fda.gov/downloads/Drugs/DrugSafety/ucm088660.pdf%E2%80%8E |url-status=live }}</ref><ref name=":1">{{cite journal | vauthors = Cox GR, Callahan P, Churchill R, Hunot V, Merry SN, Parker AG, Hetrick SE | title = Psychological therapies versus antidepressant medication, alone and in combination for depression in children and adolescents | journal = The Cochrane Database of Systematic Reviews | issue = 11 | pages = CD008324 | date = November 2014 | volume = 2014 | pmid = 25433518 | doi = 10.1002/14651858.CD008324.pub3 | pmc = 8556660 }}</ref> The National Institute for Health and Care Excellence (NICE) places the excess risk in the "early stages of treatment".<ref>{{cite web|url=https://www.nice.org.uk/guidance/CG90|title=Overview | Depression in adults: recognition and management | Guidance | NICE|website=www.nice.org.uk|date=28 October 2009|access-date=30 May 2022|archive-date=31 May 2022|archive-url=https://web.archive.org/web/20220531145902/https://www.nice.org.uk/guidance/cg90|url-status=live}}</ref> The European Psychiatric Association places the excess risk in the first two weeks of treatment and, based on a combination of epidemiological, prospective cohort, medical claims, and randomized clinical trial data, concludes that a protective effect dominates after this early period. A 2014 Cochrane review found that at six to nine months, suicidal ideation remained higher in children treated with antidepressants compared to those treated with psychological therapy.<ref name=":1" /> | ||
A recent comparison of aggression and hostility occurring during treatment with fluoxetine to placebo in children and adolescents found that no significant difference between the fluoxetine group and a placebo group.<ref>{{cite journal | vauthors = Tauscher-Wisniewski S, Nilsson M, Caldwell C, Plewes J, Allen AJ | title = Meta-analysis of aggression and/or hostility-related events in children and adolescents treated with fluoxetine compared with placebo | journal = Journal of Child and Adolescent Psychopharmacology | volume = 17 | issue = 5 | pages = 713–718 | date = October 2007 | pmid = 17979590 | doi = 10.1089/cap.2006.0138 }}</ref> There is also evidence that higher rates of SSRI prescriptions are associated with lower rates of suicide in children, though since the evidence is ]al, the true nature of the relationship is unclear.<ref name="pmid17074941">{{cite journal | vauthors = Gibbons RD, Hur K, Bhaumik DK, Mann JJ | title = The relationship between antidepressant prescription rates and rate of early adolescent suicide | journal = The American Journal of Psychiatry | volume = 163 | issue = 11 | pages = 1898–1904 | date = November 2006 | pmid = 17074941 | doi = 10.1176/appi.ajp.163.11.1898 | s2cid = 2390497 }}</ref> | A recent comparison of aggression and hostility occurring during treatment with fluoxetine to placebo in children and adolescents found that no significant difference between the fluoxetine group and a placebo group.<ref>{{cite journal | vauthors = Tauscher-Wisniewski S, Nilsson M, Caldwell C, Plewes J, Allen AJ | title = Meta-analysis of aggression and/or hostility-related events in children and adolescents treated with fluoxetine compared with placebo | journal = Journal of Child and Adolescent Psychopharmacology | volume = 17 | issue = 5 | pages = 713–718 | date = October 2007 | pmid = 17979590 | doi = 10.1089/cap.2006.0138 }}</ref> There is also evidence that higher rates of SSRI prescriptions are associated with lower rates of suicide in children, though since the evidence is ]al, the true nature of the relationship is unclear.<ref name="pmid17074941">{{cite journal | vauthors = Gibbons RD, Hur K, Bhaumik DK, Mann JJ | title = The relationship between antidepressant prescription rates and rate of early adolescent suicide | journal = The American Journal of Psychiatry | volume = 163 | issue = 11 | pages = 1898–1904 | date = November 2006 | pmid = 17074941 | doi = 10.1176/appi.ajp.163.11.1898 | s2cid = 2390497 }}</ref> | ||
In 2004, the ] (MHRA) in the ] judged fluoxetine (Prozac) to be the only antidepressant that offered a favorable ] in children with depression, though it was also associated with a slight increase in the risk of self-harm and suicidal ideation.<ref>{{cite web|url=http://www.mhra.gov.uk/home/groups/pl-p/documents/drugsafetymessage/con019472.pdf |title=Report of the CSM expert working group on the safety of selective serotonin reuptake inhibitor antidepressants|access-date=2007-09-25 |date=2004-12-01 |publisher=] }}</ref> Only two SSRIs are licensed for use with children in the UK, ] (Zoloft) and ] (Luvox), for the treatment of ]. Fluoxetine is not licensed for this use.<ref name=MHRAoverview>{{cite web |url=http://www.mhra.gov.uk/Safetyinformation/Safetywarningsalertsandrecalls/Safetywarningsandmessagesformedicines/CON019494 |title=Selective Serotonin Reuptake Inhibitors (SSRIs): Overview of regulatory status and CSM advice relating to major depressive disorder (MDD) in children and adolescents including a summary of available safety and efficacy data |date=2005-09-29 |publisher=] |access-date=2008-05-29 |url-status=dead |archive-url=https://web.archive.org/web/20080802183642/http://www.mhra.gov.uk/Safetyinformation/Safetywarningsalertsandrecalls/Safetywarningsandmessagesformedicines/CON019494 |archive-date=2008-08-02 }}</ref> | In 2004, the ] (MHRA) in the ] judged fluoxetine (Prozac) to be the only antidepressant that offered a favorable ] in children with depression, though it was also associated with a slight increase in the risk of self-harm and suicidal ideation.<ref>{{cite web |url=http://www.mhra.gov.uk/home/groups/pl-p/documents/drugsafetymessage/con019472.pdf |title=Report of the CSM expert working group on the safety of selective serotonin reuptake inhibitor antidepressants |access-date=2007-09-25 |date=2004-12-01 |publisher=] |archive-date=2008-02-28 |archive-url=https://web.archive.org/web/20080228024705/http://www.mhra.gov.uk/home/groups/pl-p/documents/drugsafetymessage/con019472.pdf |url-status=live }}</ref> Only two SSRIs are licensed for use with children in the UK, ] (Zoloft) and ] (Luvox), for the treatment of ]. Fluoxetine is not licensed for this use.<ref name=MHRAoverview>{{cite web |url=http://www.mhra.gov.uk/Safetyinformation/Safetywarningsalertsandrecalls/Safetywarningsandmessagesformedicines/CON019494 |title=Selective Serotonin Reuptake Inhibitors (SSRIs): Overview of regulatory status and CSM advice relating to major depressive disorder (MDD) in children and adolescents including a summary of available safety and efficacy data |date=2005-09-29 |publisher=] |access-date=2008-05-29 |url-status=dead |archive-url=https://web.archive.org/web/20080802183642/http://www.mhra.gov.uk/Safetyinformation/Safetywarningsalertsandrecalls/Safetywarningsandmessagesformedicines/CON019494 |archive-date=2008-08-02 }}</ref> | ||
====Adults==== | ====Adults==== | ||
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=== Bipolar switch === | === Bipolar switch === | ||
In adults and children with ], SSRIs may cause a bipolar switch from depression into ]/]. When taken with mood |
In adults and children with ], SSRIs may cause a bipolar switch from depression into ]/], mixed states or ].<ref>Chris Aiken: , May 14, 2019. In: psychiatrictimes.com</ref> When taken with ]s, the risk of switching is not increased, however when taking SSRIs as a ], the risk of switching may be twice or three times that of the average.<ref>{{cite journal | vauthors = Gitlin MJ | title = Antidepressants in bipolar depression: an enduring controversy | journal = International Journal of Bipolar Disorders | volume = 6 | issue = 1 | pages = 25 | date = December 2018 | pmid = 30506151 | pmc = 6269438 | doi = 10.1186/s40345-018-0133-9 | doi-access = free }}</ref><ref>{{cite journal | vauthors = Viktorin A, Lichtenstein P, Thase ME, Larsson H, Lundholm C, Magnusson PK, Landén M | title = The risk of switch to mania in patients with bipolar disorder during treatment with an antidepressant alone and in combination with a mood stabilizer | journal = The American Journal of Psychiatry | volume = 171 | issue = 10 | pages = 1067–1073 | date = October 2014 | pmid = 24935197 | doi = 10.1176/appi.ajp.2014.13111501 | s2cid = 25152608 | hdl = 10616/42159 | hdl-access = free }}</ref> The changes are not often easy to detect and require monitoring by family and mental health professionals.<ref>{{cite journal | vauthors = Walkup J, Labellarte M | title = Complications of SSRI treatment | journal = Journal of Child and Adolescent Psychopharmacology | volume = 11 | issue = 1 | pages = 1–4 | date = 2001 | pmid = 11322738 | doi = 10.1089/104454601750143320 }}</ref> This switch might happen even with no prior (hypo)manic episodes and might therefore not be foreseen by the psychiatrist. | ||
==Interactions== | ==Interactions== | ||
The following drugs may precipitate ] in people on SSRIs:<ref>{{cite journal | vauthors = Ener RA, Meglathery SB, Van Decker WA, Gallagher RM | title = Serotonin syndrome and other serotonergic disorders | journal = Pain Medicine | volume = 4 | issue = 1 | pages = 63–74 | date = March 2003 | pmid = 12873279 | doi = 10.1046/j.1526-4637.2003.03005.x | doi-access = free }}</ref><ref>{{cite journal | vauthors = Boyer EW, Shannon M | title = The serotonin syndrome | journal = The New England Journal of Medicine | volume = 352 | issue = 11 | pages = 1112–1120 | date = March 2005 | pmid = 15784664 | doi = 10.1056/NEJMra041867 | s2cid = 37959124 }}</ref> | The following drugs may precipitate ] in people on SSRIs:<ref>{{cite journal | vauthors = Ener RA, Meglathery SB, Van Decker WA, Gallagher RM | title = Serotonin syndrome and other serotonergic disorders | journal = Pain Medicine | volume = 4 | issue = 1 | pages = 63–74 | date = March 2003 | pmid = 12873279 | doi = 10.1046/j.1526-4637.2003.03005.x | doi-access = free }}</ref><ref>{{cite journal | vauthors = Boyer EW, Shannon M | title = The serotonin syndrome | journal = The New England Journal of Medicine | volume = 352 | issue = 11 | pages = 1112–1120 | date = March 2005 | pmid = 15784664 | doi = 10.1056/NEJMra041867 | s2cid = 37959124 }}</ref> | ||
* ] | * ] | ||
* ] (MAOIs) including ], ], ], ] and ] | * ] (MAOIs) including ], ], ], ] and ] | ||
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Painkillers of the NSAIDs drug family may interfere and reduce efficiency of SSRIs and may compound the increased risk of gastrointestinal bleeds caused by SSRI use.<ref name = Maudsley>{{cite book | vauthors = Taylor D, Carol P, Shitij K | title=The Maudsley prescribing guidelines in psychiatry|year=2012|publisher=Wiley-Blackwell|location=West Sussex|isbn=978-0-470-97969-3}}</ref><ref name = NSAIDs /><ref>{{cite journal | vauthors = Warner-Schmidt JL, Vanover KE, Chen EY, Marshall JJ, Greengard P | title = Antidepressant effects of selective serotonin reuptake inhibitors (SSRIs) are attenuated by antiinflammatory drugs in mice and humans | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 108 | issue = 22 | pages = 9262–9267 | date = May 2011 | pmid = 21518864 | pmc = 3107316 | doi = 10.1073/pnas.1104836108 | doi-access = free }}</ref> NSAIDs include: | Painkillers of the NSAIDs drug family may interfere and reduce efficiency of SSRIs and may compound the increased risk of gastrointestinal bleeds caused by SSRI use.<ref name = Maudsley>{{cite book | vauthors = Taylor D, Carol P, Shitij K | title=The Maudsley prescribing guidelines in psychiatry|year=2012|publisher=Wiley-Blackwell|location=West Sussex|isbn=978-0-470-97969-3}}</ref><ref name = NSAIDs /><ref>{{cite journal | vauthors = Warner-Schmidt JL, Vanover KE, Chen EY, Marshall JJ, Greengard P | title = Antidepressant effects of selective serotonin reuptake inhibitors (SSRIs) are attenuated by antiinflammatory drugs in mice and humans | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 108 | issue = 22 | pages = 9262–9267 | date = May 2011 | pmid = 21518864 | pmc = 3107316 | doi = 10.1073/pnas.1104836108 | doi-access = free }}</ref> NSAIDs include: | ||
* ] | * ] | ||
* ] (Advil, Nurofen) | * ] (Advil, Nurofen) | ||
* ] (Aleve) | * ] (Aleve) | ||
There are a number of potential pharmacokinetic interactions between the various individual SSRIs and other medications. Most of these arise from the fact that every SSRI has the ability to inhibit certain ].<ref name = GG>{{cite book| vauthors= Brunton L, Chabner B, Knollman B |title=Goodman and Gilman's The Pharmacological Basis of Therapeutics |edition=12th |publisher=McGraw Hill Professional |year=2010 |isbn=978-0-07-162442-8 }}</ref><ref>{{cite book | vauthors = Ciraulo DA, Shader RI | title=Pharmacotherapy of Depression | url = https://archive.org/details/pharmacotherapyd00cira | url-access = limited |year=2011 |publisher=Springer |isbn=978-1-60327-435-7 |page= | edition=2nd |doi=10.1007/978-1-60327-435-7 | veditors = Ciraulo DA, Shader RI }}</ref><ref>{{cite journal | vauthors = Jeppesen U, Gram LF, Vistisen K, Loft S, Poulsen HE, Brøsen K | title = Dose-dependent inhibition of CYP1A2, CYP2C19 and CYP2D6 by citalopram, fluoxetine, fluvoxamine and paroxetine | journal = European Journal of Clinical Pharmacology | volume = 51 | issue = 1 | pages = 73–78 | year = 1996 | pmid = 8880055 | doi = 10.1007/s002280050163 | s2cid = 19802446 }}</ref> | There are a number of potential pharmacokinetic interactions between the various individual SSRIs and other medications. Most of these arise from the fact that every SSRI has the ability to inhibit certain ] ]s.<ref name = GG>{{cite book| vauthors= Brunton L, Chabner B, Knollman B |title=Goodman and Gilman's The Pharmacological Basis of Therapeutics |edition=12th |publisher=McGraw Hill Professional |year=2010 |isbn=978-0-07-162442-8 }}</ref><ref>{{cite book | vauthors = Ciraulo DA, Shader RI | title=Pharmacotherapy of Depression | url = https://archive.org/details/pharmacotherapyd00cira | url-access = limited |year=2011 |publisher=Springer |isbn=978-1-60327-435-7 |page= | edition=2nd |doi=10.1007/978-1-60327-435-7 | veditors = Ciraulo DA, Shader RI }}</ref><ref name="Wyska2019" /><ref>{{cite journal | vauthors = Jeppesen U, Gram LF, Vistisen K, Loft S, Poulsen HE, Brøsen K | title = Dose-dependent inhibition of CYP1A2, CYP2C19 and CYP2D6 by citalopram, fluoxetine, fluvoxamine and paroxetine | journal = European Journal of Clinical Pharmacology | volume = 51 | issue = 1 | pages = 73–78 | year = 1996 | pmid = 8880055 | doi = 10.1007/s002280050163 | s2cid = 19802446 }}</ref> | ||
{| class="wikitable" | {| class="wikitable" | ||
|+ Cytochrome P450 enzyme inhibition by SSRIs | |||
|- | |- | ||
! Drug name !! ] !! ] !! ] !! ] !! ] !! ] | ! Drug name !! ] !! ] !! ] !! ] !! ] !! ] | ||
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'''Legend:'''<br /> | '''Legend:'''<br /> | ||
0{{snd}}no inhibition<br /> | 0{{snd}}no inhibition<br /> | ||
+{{snd}}mild inhibition<br /> | +{{snd}}mild/weak inhibition<br /> | ||
++{{snd}}moderate inhibition<br /> | ++{{snd}}moderate inhibition<br /> | ||
+++{{snd}}strong inhibition | +++{{snd}}strong/potent inhibition | ||
The CYP2D6 enzyme is entirely responsible for the metabolism of ], ]<ref>{{cite journal | vauthors = Overholser BR, Foster DR | title = Opioid pharmacokinetic drug-drug interactions | journal = The American Journal of Managed Care | volume = 17 | issue = Suppl 11 | pages = S276–287 | date = September 2011 | pmid = 21999760 | url = https://www.ajmc.com/pubMed.php?pii=51946 }}</ref> and dihydrocodeine to their active metabolites (], ], and ], respectively), which in turn undergo phase 2 ]. These opioids (and to a lesser extent ], ], and ]) have interaction potential with selective serotonin reuptake inhibitors.<ref>{{cite web | url = https://www.pdr.net/drug-summary/Paxil-paroxetine-hydrochloride-215.2678 | title = Paroxetine hydrochloride – Drug Summary | publisher = Physicians' Desk Reference, LLC |access-date=2018-09-17}}</ref><ref>{{cite journal | vauthors = Smith HS | title = Opioid metabolism | journal = Mayo Clinic Proceedings | volume = 84 | issue = 7 | pages = 613–624 | date = July 2009 | pmid = 19567715 | pmc = 2704133 | doi = 10.4065/84.7.613 }}</ref> The concomitant use of some SSRIs (] and ]) with ] may decrease the plasma concentration of active metabolite morphine, which may result in reduced analgesic efficacy.<ref>{{cite journal | vauthors = Wiley K, Regan A, McIntyre P | title = Immunisation and pregnancy – who, what, when and why? | journal = Australian Prescriber | volume = 40 | issue = 4 | pages = 122–124 | date = August 2017 | pmid = 28947846 | pmc = 5601969 | doi = 10.18773/austprescr.2017.046 }}</ref><ref>{{cite journal | vauthors = Weaver JM | title = New FDA black box warning for codeine: how will this affect dentists? | journal = Anesthesia Progress | volume = 60 | issue = 2 | pages = 35–36 | year = 2013 | pmid = 23763556 | pmc = 3683877 | doi = 10.2344/0003-3006-60.2.35 }}</ref> | The CYP2D6 enzyme is entirely responsible for the metabolism of ], ]<ref>{{cite journal | vauthors = Overholser BR, Foster DR | title = Opioid pharmacokinetic drug-drug interactions | journal = The American Journal of Managed Care | volume = 17 | issue = Suppl 11 | pages = S276–287 | date = September 2011 | pmid = 21999760 | url = https://www.ajmc.com/pubMed.php?pii=51946 }}</ref> and dihydrocodeine to their active metabolites (], ], and ], respectively), which in turn undergo phase 2 ]. These opioids (and to a lesser extent ], ], and ]) have interaction potential with selective serotonin reuptake inhibitors.<ref>{{cite web | url = https://www.pdr.net/drug-summary/Paxil-paroxetine-hydrochloride-215.2678 | title = Paroxetine hydrochloride – Drug Summary | publisher = Physicians' Desk Reference, LLC | access-date = 2018-09-17 | archive-date = 2018-09-28 | archive-url = https://web.archive.org/web/20180928172320/http://www.pdr.net/drug-summary/Paxil-paroxetine-hydrochloride-215.2678 | url-status = live }}</ref><ref>{{cite journal | vauthors = Smith HS | title = Opioid metabolism | journal = Mayo Clinic Proceedings | volume = 84 | issue = 7 | pages = 613–624 | date = July 2009 | pmid = 19567715 | pmc = 2704133 | doi = 10.4065/84.7.613 }}</ref> The concomitant use of some SSRIs (] and ]) with ] may decrease the plasma concentration of active metabolite morphine, which may result in reduced analgesic efficacy.<ref>{{cite journal | vauthors = Wiley K, Regan A, McIntyre P | title = Immunisation and pregnancy – who, what, when and why? | journal = Australian Prescriber | volume = 40 | issue = 4 | pages = 122–124 | date = August 2017 | pmid = 28947846 | pmc = 5601969 | doi = 10.18773/austprescr.2017.046 }}</ref><ref>{{cite journal | vauthors = Weaver JM | title = New FDA black box warning for codeine: how will this affect dentists? | journal = Anesthesia Progress | volume = 60 | issue = 2 | pages = 35–36 | year = 2013 | pmid = 23763556 | pmc = 3683877 | doi = 10.2344/0003-3006-60.2.35 }}</ref> | ||
Another important interaction of certain SSRIs involves paroxetine, a potent inhibitor of CYP2D6, and tamoxifen, an agent used commonly in the treatment and prevention of breast cancer. Tamoxifen is a prodrug that is metabolised by the hepatic cytochrome P450 enzyme system, especially CYP2D6, to its active metabolites. Concomitant use of paroxetine and tamoxifen in women with breast cancer is associated with a higher risk of death, as much as a 91 percent in women who used it the longest.<ref>{{cite journal | vauthors = Kelly CM, Juurlink DN, Gomes T, Duong-Hua M, Pritchard KI, Austin PC, Paszat LF | title = Selective serotonin reuptake inhibitors and breast cancer mortality in women receiving tamoxifen: a population based cohort study | journal = BMJ | volume = 340 | pages = c693 | date = February 2010 | pmid = 20142325 | pmc = 2817754 | doi = 10.1136/bmj.c693 }}</ref> | Another important interaction of certain SSRIs involves paroxetine, a potent inhibitor of CYP2D6, and tamoxifen, an agent used commonly in the treatment and prevention of breast cancer. Tamoxifen is a prodrug that is metabolised by the hepatic cytochrome P450 enzyme system, especially CYP2D6, to its active metabolites. Concomitant use of paroxetine and tamoxifen in women with breast cancer is associated with a higher risk of death, as much as a 91 percent in women who used it the longest.<ref>{{cite journal | vauthors = Kelly CM, Juurlink DN, Gomes T, Duong-Hua M, Pritchard KI, Austin PC, Paszat LF | title = Selective serotonin reuptake inhibitors and breast cancer mortality in women receiving tamoxifen: a population based cohort study | journal = BMJ | volume = 340 | pages = c693 | date = February 2010 | pmid = 20142325 | pmc = 2817754 | doi = 10.1136/bmj.c693 }}</ref> | ||
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{{Main|SSRI discontinuation syndrome}} | {{Main|SSRI discontinuation syndrome}} | ||
Serotonin reuptake inhibitors should not be abruptly discontinued after extended therapy, and whenever possible, should be tapered over several weeks to minimize discontinuation-related symptoms which may include nausea, headache, dizziness, chills, body aches, paresthesias, insomnia, and ]. Paroxetine may produce discontinuation-related symptoms at a greater rate than other SSRIs, though qualitatively similar effects have been reported for all SSRIs.<ref name="psychiatryonline.org">{{cite book | |
Serotonin reuptake inhibitors should not be abruptly discontinued after extended therapy, and whenever possible, should be tapered over several weeks to minimize discontinuation-related symptoms which may include nausea, headache, dizziness, chills, body aches, paresthesias, insomnia, and ]. Paroxetine may produce discontinuation-related symptoms at a greater rate than other SSRIs, though qualitatively similar effects have been reported for all SSRIs.<ref name="psychiatryonline.org">{{cite book |vauthors=Gelenberg AJ, Freeman MP, Markowitz JC, Rosenbaum JF, Thase ME, Trivedi MH |url=https://psychiatryonline.org/pb/assets/raw/sitewide/practice_guidelines/guidelines/mdd.pdf |title=Practice Guideline for the Treatment of Patients With Major Depressive Disorder |date=October 2010 |publisher=American Psychiatric Association |isbn=978-0-89042-338-7 |edition=third |access-date=2018-07-22 |archive-date=2020-08-07 |archive-url=https://web.archive.org/web/20200807023035/https://psychiatryonline.org/pb/assets/raw/sitewide/practice_guidelines/guidelines/mdd.pdf |url-status=live }}{{page needed|date=February 2019}}</ref><ref>{{cite journal | vauthors = Renoir T | title = Selective serotonin reuptake inhibitor antidepressant treatment discontinuation syndrome: a review of the clinical evidence and the possible mechanisms involved | journal = Frontiers in Pharmacology | volume = 4 | pages = 45 | year = 2013 | pmid = 23596418 | pmc = 3627130 | doi = 10.3389/fphar.2013.00045 | doi-access = free }}</ref> Discontinuation effects appear to be less for fluoxetine, perhaps owing to its long half-life and the natural tapering effect associated with its slow clearance from the body. One strategy for minimizing SSRI discontinuation symptoms is to switch the patient to fluoxetine and then taper and discontinue the fluoxetine.<ref name="psychiatryonline.org" /> | ||
==Mechanism of action== | ==Mechanism of action== | ||
{{see also|Pharmacology of antidepressants}} | |||
===Serotonin reuptake inhibition=== | ===Serotonin reuptake inhibition=== | ||
In the ], messages are passed from a ] to another via a ], a small gap between the cells. The ] that sends the information releases neurotransmitters including serotonin into that gap. The neurotransmitters are then recognized by ] on the surface of the recipient postsynaptic cell, which upon this stimulation, in turn, relays the signal. About 10% of the neurotransmitters are lost in this process; the other 90% are released from the receptors and taken up again by ]s into the sending presynaptic cell, a process called ''reuptake''. | In the ], messages are passed from a ] to another via a ], a small gap between the cells. The ] that sends the information releases neurotransmitters including serotonin into that gap. The neurotransmitters are then recognized by ] on the surface of the recipient postsynaptic cell, which upon this stimulation, in turn, relays the signal. About 10% of the neurotransmitters are lost in this process; the other 90% are released from the receptors and taken up again by ]s into the sending presynaptic cell, a process called ''reuptake''. | ||
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|} | |} | ||
In addition to their actions as reuptake inhibitors of serotonin, some SSRIs are also, coincidentally, ]s of the ]s.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> ] is an ] of the ], while ] is an ] of the σ<sub>1</sub> receptor, and ] does not significantly interact with the σ<sub>1</sub> receptor.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> None of the SSRIs have significant affinity for the ].<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> Fluvoxamine has by far the strongest activity of the SSRIs at the σ<sub>1</sub> receptor.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> High occupancy of the σ<sub>1</sub> receptor by clinical dosages of fluvoxamine has been observed in the human brain in ] (PET) research.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> It is thought that agonism of the σ<sub>1</sub> receptor by fluvoxamine may have beneficial effects on ].<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> In contrast to fluvoxamine, the relevance of the σ<sub>1</sub> receptor in the actions of the other SSRIs is uncertain and questionable due to their very low affinity for the receptor relative to the SERT.<ref>{{cite journal | vauthors = Kishimoto A, Todani A, Miura J, Kitagaki T, Hashimoto K | title = The opposite effects of fluvoxamine and sertraline in the treatment of psychotic major depression: a case report | journal = Annals of General Psychiatry | volume = 9 | pages = 23 | date = May 2010 | pmid = 20492642 | pmc = 2881105 | doi = 10.1186/1744-859X-9-23 | doi-access = free }}</ref> | In addition to their actions as reuptake inhibitors of serotonin, some SSRIs are also, coincidentally, ]s of the ]s.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> ] is an ] of the ], while ] is an ] of the σ<sub>1</sub> receptor, and ] does not significantly interact with the σ<sub>1</sub> receptor.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> None of the SSRIs have significant affinity for the ].<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> Fluvoxamine has by far the strongest activity of the SSRIs at the σ<sub>1</sub> receptor.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> High occupancy of the σ<sub>1</sub> receptor by clinical dosages of fluvoxamine has been observed in the human brain in ] (PET) research.<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> It is thought that agonism of the σ<sub>1</sub> receptor by fluvoxamine may have beneficial effects on ].<ref name="pmid20373470" /><ref name="AlbayrakHashimoto2017" /> In contrast to fluvoxamine, the relevance of the σ<sub>1</sub> receptor in the actions of the other SSRIs is uncertain and questionable due to their very low affinity for the receptor relative to the ].<ref>{{cite journal | vauthors = Kishimoto A, Todani A, Miura J, Kitagaki T, Hashimoto K | title = The opposite effects of fluvoxamine and sertraline in the treatment of psychotic major depression: a case report | journal = Annals of General Psychiatry | volume = 9 | pages = 23 | date = May 2010 | pmid = 20492642 | pmc = 2881105 | doi = 10.1186/1744-859X-9-23 | doi-access = free }}</ref> | ||
===Anti-inflammatory effects=== | ===Anti-inflammatory effects=== | ||
The role of inflammation and the immune system in depression has been extensively studied. The evidence supporting this link has been shown in numerous studies over the past ten years. Nationwide studies and meta-analyses of smaller cohort studies have uncovered a correlation between pre-existing inflammatory conditions such as ], ] (RA), or ], and an increased risk of depression. Data also shows that using pro-inflammatory agents in the treatment of diseases like ] can lead to depression. Several meta-analytical studies have found increased levels of proinflammatory ] and ] in depressed patients.<ref>{{cite journal | vauthors = Bafna SL, Patel DJ, Mehta JD | title = Separation of ascorbic acid and 2-keto-L-gulonic acid | journal = Current Neuropharmacology| volume = 61 | issue = 8 | pages = 1333–1334 | date = August 1972 | pmc = 5050394 | doi = 10.2174/1570159X14666151208113700 | pmid = 27640518 }}</ref> This link has led scientists to investigate the effects of antidepressants on the immune system. | The role of inflammation and the immune system in depression has been extensively studied. The evidence supporting this link has been shown in numerous studies over the past ten years. Nationwide studies and meta-analyses of smaller cohort studies have uncovered a correlation between pre-existing inflammatory conditions such as ], ] (RA), or ], and an increased risk of depression. Data also shows that using pro-inflammatory agents in the treatment of diseases like ] can lead to depression. Several meta-analytical studies have found increased levels of proinflammatory ] and ] in depressed patients.<ref>{{cite journal | vauthors = Bafna SL, Patel DJ, Mehta JD | title = Separation of ascorbic acid and 2-keto-L-gulonic acid | journal = Current Neuropharmacology| volume = 61 | issue = 8 | pages = 1333–1334 | date = August 1972 | pmc = 5050394 | doi = 10.2174/1570159X14666151208113700 | pmid = 27640518 }}</ref> This link has led scientists to investigate the effects of antidepressants on the immune system. | ||
SSRIs were originally invented with the goal of increasing levels of available serotonin in the extracellular spaces. However, the delayed response between when patients first begin SSRI treatment to when they see effects has led scientists to believe that other molecules are involved in the efficacy of these drugs.<ref>{{cite journal | vauthors = Köhler S, Cierpinsky K, Kronenberg G, Adli M | title = The serotonergic system in the neurobiology of depression: Relevance for novel antidepressants | journal = Journal of Psychopharmacology | volume = 30 | issue = 1 | pages = 13–22 | date = January 2016 | pmid = 26464458 | doi = 10.1177/0269881115609072 | s2cid = 21501578 }}</ref> To investigate the apparent anti-inflammatory effects of SSRIs, both Kohler et al. and Więdłocha et al. conducted meta-analyses which have shown that after antidepressant treatment the levels of cytokines associated with inflammation are decreased.<ref>{{cite journal | vauthors = Köhler CA, Freitas TH, Stubbs B, Maes M, Solmi M, Veronese N, de Andrade NQ, Morris G, Fernandes BS, Brunoni AR, Herrmann N, Raison CL, Miller BJ, Lanctôt KL, Carvalho AF | title = Peripheral Alterations in Cytokine and Chemokine Levels After Antidepressant Drug Treatment for Major Depressive Disorder: Systematic Review and Meta-Analysis | journal = Molecular Neurobiology | volume = 55 | issue = 5 | pages = 4195–4206 | date = May 2018 | pmid = 28612257 | doi = 10.1007/s12035-017-0632-1 | s2cid = 4040496 | url = https://kclpure.kcl.ac.uk/portal/en/publications/peripheral-alterations-in-cytokine-and-chemokine-levels-after-antidepressant-drug-treatment-for-major-depressive-disorder(7fb3d49a-30e3-4cfd-9a1c-df003daf8dad).html }}</ref><ref>{{cite journal | vauthors = Więdłocha M, Marcinowicz P, Krupa R, Janoska-Jaździk M, Janus M, Dębowska W, Mosiołek A, Waszkiewicz N, Szulc A | title = Effect of antidepressant treatment on peripheral inflammation markers – A meta-analysis | journal = Progress in Neuro-Psychopharmacology & Biological Psychiatry | volume = 80 | issue = Pt C | pages = 217–226 | date = January 2018 | pmid = 28445690 | doi = 10.1016/j.pnpbp.2017.04.026 | s2cid = 34659323 }}</ref> A large cohort study conducted by researchers in the Netherlands investigated the association between depressive disorders, symptoms, and antidepressants with inflammation. The study showed decreased levels of ], a cytokine that has proinflammatory effects, in patients taking SSRIs compared to non-medicated patients.<ref>{{cite journal | vauthors = Vogelzangs N, Duivis HE, Beekman AT, Kluft C, Neuteboom J, Hoogendijk W, Smit JH, de Jonge P, Penninx BW | title = Association of depressive disorders, depression characteristics and antidepressant medication with inflammation | journal = Translational Psychiatry | volume = 2 | issue = 2 | pages = e79 | date = February 2012 | pmid = 22832816 | pmc = 3309556 | doi = 10.1038/tp.2012.8 }}</ref> | SSRIs were originally invented with the goal of increasing levels of available serotonin in the extracellular spaces. However, the delayed response between when patients first begin SSRI treatment to when they see effects has led scientists to believe that other molecules are involved in the efficacy of these drugs.<ref>{{cite journal | vauthors = Köhler S, Cierpinsky K, Kronenberg G, Adli M | title = The serotonergic system in the neurobiology of depression: Relevance for novel antidepressants | journal = Journal of Psychopharmacology | volume = 30 | issue = 1 | pages = 13–22 | date = January 2016 | pmid = 26464458 | doi = 10.1177/0269881115609072 | s2cid = 21501578 }}</ref> To investigate the apparent anti-inflammatory effects of SSRIs, both Kohler et al. and Więdłocha et al. conducted meta-analyses which have shown that after antidepressant treatment the levels of cytokines associated with inflammation are decreased.<ref>{{cite journal | vauthors = Köhler CA, Freitas TH, Stubbs B, Maes M, Solmi M, Veronese N, de Andrade NQ, Morris G, Fernandes BS, Brunoni AR, Herrmann N, Raison CL, Miller BJ, Lanctôt KL, Carvalho AF | title = Peripheral Alterations in Cytokine and Chemokine Levels After Antidepressant Drug Treatment for Major Depressive Disorder: Systematic Review and Meta-Analysis | journal = Molecular Neurobiology | volume = 55 | issue = 5 | pages = 4195–4206 | date = May 2018 | pmid = 28612257 | doi = 10.1007/s12035-017-0632-1 | s2cid = 4040496 | url = https://kclpure.kcl.ac.uk/portal/en/publications/peripheral-alterations-in-cytokine-and-chemokine-levels-after-antidepressant-drug-treatment-for-major-depressive-disorder(7fb3d49a-30e3-4cfd-9a1c-df003daf8dad).html | access-date = 2018-09-17 | archive-date = 2020-08-07 | archive-url = https://web.archive.org/web/20200807024106/https://kclpure.kcl.ac.uk/portal/en/publications/peripheral-alterations-in-cytokine-and-chemokine-levels-after-antidepressant-drug-treatment-for-major-depressive-disorder(7fb3d49a-30e3-4cfd-9a1c-df003daf8dad).html | url-status = live }}</ref><ref>{{cite journal | vauthors = Więdłocha M, Marcinowicz P, Krupa R, Janoska-Jaździk M, Janus M, Dębowska W, Mosiołek A, Waszkiewicz N, Szulc A | title = Effect of antidepressant treatment on peripheral inflammation markers – A meta-analysis | journal = Progress in Neuro-Psychopharmacology & Biological Psychiatry | volume = 80 | issue = Pt C | pages = 217–226 | date = January 2018 | pmid = 28445690 | doi = 10.1016/j.pnpbp.2017.04.026 | s2cid = 34659323 }}</ref> A large cohort study conducted by researchers in the Netherlands investigated the association between depressive disorders, symptoms, and antidepressants with inflammation. The study showed decreased levels of ], a cytokine that has proinflammatory effects, in patients taking SSRIs compared to non-medicated patients.<ref>{{cite journal | vauthors = Vogelzangs N, Duivis HE, Beekman AT, Kluft C, Neuteboom J, Hoogendijk W, Smit JH, de Jonge P, Penninx BW | title = Association of depressive disorders, depression characteristics and antidepressant medication with inflammation | journal = Translational Psychiatry | volume = 2 | issue = 2 | pages = e79 | date = February 2012 | pmid = 22832816 | pmc = 3309556 | doi = 10.1038/tp.2012.8 }}</ref> | ||
Treatment with SSRIs has shown reduced production of inflammatory cytokines such as ], ], IL-6, and ], which leads to a decrease in inflammation levels and subsequently a decrease in the activation level of the immune response.<ref name="microglia">{{cite journal | vauthors = Kalkman HO, Feuerbach D | title = Antidepressant therapies inhibit inflammation and microglial M1-polarization | journal = Pharmacology & Therapeutics | volume = 163 | pages = 82–93 | date = July 2016 | pmid = 27101921 | doi = 10.1016/j.pharmthera.2016.04.001 }}</ref> These inflammatory cytokines have been shown to activate ] which are specialized macrophages that reside in the brain. ] are a subset of immune cells responsible for host defense in the innate immune system. Macrophages can release cytokines and other chemicals to cause an inflammatory response. ] can induce an inflammatory response in microglia and can cause neuroinflammation. SSRIs inhibit proinflammatory cytokine production which leads to less activation of microglia and peripheral macrophages. SSRIs not only inhibit the production of these proinflammatory cytokines, they also have been shown to upregulate anti-inflammatory cytokines such as IL-10. Taken together, this reduces the overall inflammatory immune response.<ref name="microglia" /><ref name="macrophages">{{cite journal | vauthors = Nazimek K, Strobel S, Bryniarski P, Kozlowski M, Filipczak-Bryniarska I, Bryniarski K | title = The role of macrophages in anti-inflammatory activity of antidepressant drugs | journal = Immunobiology | volume = 222 | issue = 6 | pages = 823–830 | date = June 2017 | pmid = 27453459 | doi = 10.1016/j.imbio.2016.07.001 }}</ref> | Treatment with SSRIs has shown reduced production of inflammatory cytokines such as ], ], IL-6, and ], which leads to a decrease in inflammation levels and subsequently a decrease in the activation level of the immune response.<ref name="microglia">{{cite journal | vauthors = Kalkman HO, Feuerbach D | title = Antidepressant therapies inhibit inflammation and microglial M1-polarization | journal = Pharmacology & Therapeutics | volume = 163 | pages = 82–93 | date = July 2016 | pmid = 27101921 | doi = 10.1016/j.pharmthera.2016.04.001 }}</ref> These inflammatory cytokines have been shown to activate ] which are specialized macrophages that reside in the brain. ] are a subset of immune cells responsible for host defense in the innate immune system. Macrophages can release cytokines and other chemicals to cause an inflammatory response. ] can induce an inflammatory response in microglia and can cause neuroinflammation. SSRIs inhibit proinflammatory cytokine production which leads to less activation of microglia and peripheral macrophages. SSRIs not only inhibit the production of these proinflammatory cytokines, they also have been shown to upregulate anti-inflammatory cytokines such as IL-10. Taken together, this reduces the overall inflammatory immune response.<ref name="microglia" /><ref name="macrophages">{{cite journal | vauthors = Nazimek K, Strobel S, Bryniarski P, Kozlowski M, Filipczak-Bryniarska I, Bryniarski K | title = The role of macrophages in anti-inflammatory activity of antidepressant drugs | journal = Immunobiology | volume = 222 | issue = 6 | pages = 823–830 | date = June 2017 | pmid = 27453459 | doi = 10.1016/j.imbio.2016.07.001 }}</ref> | ||
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SSRIs act on signal pathways such as ] (cAMP) on the postsynaptic neuronal cell, which leads to the release of ] (BDNF). BDNF enhances the growth and survival of cortical neurons and synapses.<ref name="Kolb 2006"/> | SSRIs act on signal pathways such as ] (cAMP) on the postsynaptic neuronal cell, which leads to the release of ] (BDNF). BDNF enhances the growth and survival of cortical neurons and synapses.<ref name="Kolb 2006"/> | ||
==Pharmacokinetics== | |||
SSRIs vary in their ] properties.<ref name="Wyska2019" /> | |||
{| class="wikitable" | |||
|+ Comparative ] of SSRIs<ref name="Wyska2019">{{cite journal | vauthors = Wyska E | title = Pharmacokinetic considerations for current state-of-the-art antidepressants | journal = Expert Opin Drug Metab Toxicol | volume = 15 | issue = 10 | pages = 831–847 | date = October 2019 | pmid = 31526279 | doi = 10.1080/17425255.2019.1669560 | url = }}</ref> | |||
|- | |||
! SSRI !! {{Abbrlink|F|Bioavailability}} (%) !! {{Abbrlink|V<sub>d</sub>|Volume of distribution}} (L/kg) !! {{Abbrlink|logP|Partition coefficient}} !! {{Abbrlink|PPB|Plasma protein binding}} (%) !! Major ] ]s (additional) !! {{Abbrlink|t<sub>1/2</sub>|Elimination half-life}} (h) !! Dose (mg) !! Levels (ng/mL) | |||
|- | |||
| ] || 80 || 12 || 3.76 || 80 || ], ] (]) || 35 || 20–40 || 50–110 | |||
|- | |||
| ] || 80 || 12 || 3.5 || 56 || CYP3A4, CYP2C19 || 27–32 || 10–20 || 15–80 | |||
|- | |||
| ] || 60–80 || 20–45 || 4.05 || 95 || CYP2D6, ] (CYP2C19) || 24–96 || 20–60 || 120–500 | |||
|- | |||
| ] || 53 || 25 || 2.89 || 77 || CYP2D6 (]) || 12–15 || 50–300 || 60–230 | |||
|- | |||
| ] || 50–90 || 17 || 3.6 || 95 || CYP2D6 || 21 || 20–50 || 30–120 | |||
|- | |||
| ] || 80–95 || 20 || 5.1 || 98 || CYP2B6 (CYP2C19, CYP3A4, CYP2D6) || 25–26 || 50–200 || 10–150 | |||
|} | |||
==List of SSRIs== | ==List of SSRIs== | ||
===Marketed=== | ===Marketed=== | ||
⚫ | ] transporter inhibitors}}]] | ||
⚫ | ] transporter inhibitors}}]] | ||
====Antidepressants==== | ====Antidepressants==== | ||
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! colspan="7" | | ! colspan="7" | | ||
|- | |- | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
|- | |- | ||
|} | |} | ||
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! colspan="1" | | ! colspan="1" | | ||
|- | |- | ||
| ] ] | | ] ] | ||
|- | |- | ||
|} | |} | ||
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! colspan="2" | | ! colspan="2" | | ||
|- | |- | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
|- | |- | ||
|} | |} | ||
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! colspan="8" | | ! colspan="8" | | ||
|- | |- | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
| ] ] | | ] ] | ||
|- | |- | ||
|} | |} | ||
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===Related drugs=== | ===Related drugs=== | ||
Although described as ], ] (Cymbalta), ] (Effexor), and ] (Pristiq) are in fact relatively selective as ]s (SRIs).<ref name="Shelton2009">{{cite journal | vauthors = Shelton RC | year = 2009 | title = Serotonin norepinephrine reuptake inhibitors: similarities and differences | url = http://primarypsychiatry.com/serotonin-norepinephrine-reuptake-inhibitors-similarities-and-differences/ | journal = Primary Psychiatry | volume = 16 | issue = 4| page = 25 }}</ref> They are about at least 10-fold selective for inhibition of serotonin reuptake over norepinephrine reuptake.<ref name="Shelton2009" /> The selectivity ratios are approximately 1:30 for venlafaxine, 1:10 for duloxetine, and 1:14 for desvenlafaxine.<ref name="Shelton2009" /><ref>{{cite journal | vauthors = Montgomery SA | title = Tolerability of serotonin norepinephrine reuptake inhibitor antidepressants | journal = CNS Spectrums | volume = 13 | issue = 7 Suppl 11 | pages = 27–33 | date = July 2008 | pmid = 18622372 | doi = 10.1017/s1092852900028297 | s2cid = 24692832 }}</ref> At low doses, these ] act mostly as SSRIs; only at higher doses do they also prominently inhibit norepinephrine reuptake.<ref name="WallerSampson2017">{{cite book | vauthors = Waller DG, Sampson T | title = Medical Pharmacology and Therapeutics E-Book|url=https://books.google.com/books?id=6b0tDwAAQBAJ&pg=PA302|year=2017|publisher=Elsevier Health Sciences|isbn=978-0-7020-7190-4|pages=302–}}</ref><ref name="KornsteinClayton2010">{{cite book |
Although described as ], ] (Cymbalta), ] (Effexor), and ] (Pristiq) are in fact relatively selective as ]s (SRIs).<ref name="Shelton2009">{{cite journal | vauthors = Shelton RC | year = 2009 | title = Serotonin norepinephrine reuptake inhibitors: similarities and differences | url = http://primarypsychiatry.com/serotonin-norepinephrine-reuptake-inhibitors-similarities-and-differences/ | journal = Primary Psychiatry | volume = 16 | issue = 4 | page = 25 | access-date = 2017-08-26 | archive-date = 2020-08-07 | archive-url = https://web.archive.org/web/20200807032433/http://primarypsychiatry.com/serotonin-norepinephrine-reuptake-inhibitors-similarities-and-differences/ | url-status = live }}</ref> They are about at least 10-fold selective for inhibition of serotonin reuptake over norepinephrine reuptake.<ref name="Shelton2009" /> The selectivity ratios are approximately 1:30 for venlafaxine, 1:10 for duloxetine, and 1:14 for desvenlafaxine.<ref name="Shelton2009" /><ref>{{cite journal | vauthors = Montgomery SA | title = Tolerability of serotonin norepinephrine reuptake inhibitor antidepressants | journal = CNS Spectrums | volume = 13 | issue = 7 Suppl 11 | pages = 27–33 | date = July 2008 | pmid = 18622372 | doi = 10.1017/s1092852900028297 | s2cid = 24692832 }}</ref> At low doses, these ] act mostly as SSRIs; only at higher doses do they also prominently inhibit norepinephrine reuptake.<ref name="WallerSampson2017">{{cite book | vauthors = Waller DG, Sampson T | title = Medical Pharmacology and Therapeutics E-Book|url=https://books.google.com/books?id=6b0tDwAAQBAJ&pg=PA302|year=2017|publisher=Elsevier Health Sciences|isbn=978-0-7020-7190-4|pages=302–}}</ref><ref name="KornsteinClayton2010">{{cite book|vauthors=Kornstein SG, Clayton AH|title=Women's Mental Health, An Issue of Psychiatric Clinics – E-Book|url=https://books.google.com/books?id=5jpHNa19jFUC&pg=PA389|year=2010|publisher=Elsevier Health Sciences|isbn=978-1-4557-0061-5|pages=389–|access-date=2017-08-26|archive-date=2023-01-14|archive-url=https://web.archive.org/web/20230114060906/https://books.google.com/books?id=5jpHNa19jFUC&pg=PA389|url-status=live}}</ref> ] (Ixel, Savella) and its ] ] (Fetzima) are the only widely marketed ] that inhibit serotonin and norepinephrine to similar degrees, both with ratios close to 1:1.<ref name="Shelton2009" /><ref name="pmid26572745">{{cite journal | vauthors = Bruno A, Morabito P, Spina E, Muscatello MR | title = The Role of Levomilnacipran in the Management of Major Depressive Disorder: A Comprehensive Review | journal = Current Neuropharmacology | volume = 14 | issue = 2 | pages = 191–199 | year = 2016 | pmid = 26572745 | pmc = 4825949 | doi = 10.2174/1570159x14666151117122458 }}</ref> | ||
] (Viibryd) and ] (Trintellix) are SRIs that also act as ]s of ]s and are described as ] (SMS).<ref name="pmid28707591">{{cite journal | vauthors = Mandrioli R, Protti M, Mercolini L | title = New-Generation, non-SSRI Antidepressants: Therapeutic Drug Monitoring and Pharmacological Interactions. Part 1: SNRIs, SMSs, SARIs | journal = Current Medicinal Chemistry| volume = 24| issue = 7| pages = 772–792| year = 2018 | pmid = 28707591 | doi = 10.2174/0929867324666170712165042 }}</ref> Vilazodone is a ] ] while vortioxetine is a 5-HT<sub>1A</sub> receptor agonist and ] and ] ].<ref name="pmid28707591" /> ] (SL 81–0385) and ] (YM-992, YM-35995) are similar drugs that were never marketed.<ref name="Ayd2000">{{cite book| |
] (Viibryd) and ] (Trintellix) are SRIs that also act as ]s of ]s and are described as ] (SMS).<ref name="pmid28707591">{{cite journal | vauthors = Mandrioli R, Protti M, Mercolini L | title = New-Generation, non-SSRI Antidepressants: Therapeutic Drug Monitoring and Pharmacological Interactions. Part 1: SNRIs, SMSs, SARIs | journal = Current Medicinal Chemistry| volume = 24| issue = 7| pages = 772–792| year = 2018 | pmid = 28707591 | doi = 10.2174/0929867324666170712165042 }}</ref> Vilazodone is a ] ] while vortioxetine is a 5-HT<sub>1A</sub> receptor agonist and ] and ] ].<ref name="pmid28707591" /> ] (SL 81–0385) and ] (YM-992, YM-35995) are similar drugs that were never marketed.<ref name="Ayd2000">{{cite book|vauthors=Ayd FJ|title=Lexicon of Psychiatry, Neurology, and the Neurosciences|url=https://books.google.com/books?id=ea_QVG2BFy8C&pg=PA581|year=2000|publisher=Lippincott Williams & Wilkins|isbn=978-0-7817-2468-5|pages=581–|access-date=2017-08-26|archive-date=2023-01-14|archive-url=https://web.archive.org/web/20230114060907/https://books.google.com/books?id=ea_QVG2BFy8C&pg=PA581|url-status=live}}</ref><ref name="Birkhäuser2012">{{cite book|title=Progress in Drug Research|url=https://books.google.com/books?id=-d8FCAAAQBAJ&pg=PA80|year=2012|publisher=Birkhäuser|isbn=978-3-0348-8391-7|pages=80–82}}</ref><ref name="pmid17017959">{{cite journal | vauthors = Moltzen EK, Bang-Andersen B | title = Serotonin reuptake inhibitors: the corner stone in treatment of depression for half a century{{snd}}a medicinal chemistry survey | journal = Current Topics in Medicinal Chemistry| volume = 6 | issue = 17 | pages = 1801–1823 | year = 2006 | pmid = 17017959 | doi = 10.2174/156802606778249810}}</ref><ref name="Haddad2000">{{cite journal |doi=10.1002/1099-1077(200008)15:6<471::AID-HUP211>3.0.CO;2-4 |title=Selective Serotonin Reuptake Inhibitors (SSRIs) Past, Present and Future. Edited by S. Clare Standford, R.G. Landes Company |location=Austin, Texas |year=1999|isbn=1-57059-649-2 |journal=Human Psychopharmacology: Clinical and Experimental |volume=15 |issue=6 |pages=471 | vauthors = Haddad PM }}</ref> They are SRIs and litoxetine is also a 5-HT<sub>3</sub> receptor antagonist<ref name="Ayd2000" /><ref name="Birkhäuser2012" /> while lubazodone is also a ] antagonist.<ref name="pmid17017959" /><ref name="Haddad2000" /> | ||
==History== | ==History== |
Latest revision as of 00:30, 23 December 2024
Class of antidepressant medication"SSRI" redirects here. For other uses, see SSRI (disambiguation).
Selective serotonin reuptake inhibitor | |
---|---|
Drug class | |
Serotonin, the neurotransmitter that is involved in the mechanism of action of SSRIs | |
Class identifiers | |
Synonyms | Serotonin-specific reuptake inhibitors, serotonergic antidepressants |
Use | Major depressive disorder, anxiety disorders |
ATC code | N06AB |
Biological target | Serotonin transporter |
Clinical data | |
Drugs.com | Drug Classes |
Consumer Reports | Best Buy Drugs |
External links | |
MeSH | D017367 |
Legal status | |
In Wikidata |
Selective serotonin reuptake inhibitors (SSRIs) are a class of drugs that are typically used as antidepressants in the treatment of major depressive disorder, anxiety disorders, and other psychological conditions.
SSRIs increase the extracellular level of the neurotransmitter serotonin by limiting its reabsorption (reuptake) into the presynaptic cell. They have varying degrees of selectivity for the other monoamine transporters, with pure SSRIs having strong affinity for the serotonin transporter and only weak affinity for the norepinephrine and dopamine transporters.
SSRIs are the most widely prescribed antidepressants in many countries. The efficacy of SSRIs in mild or moderate cases of depression has been disputed and may or may not be outweighed by side effects, especially in adolescent populations.
Medical uses
The main indication for SSRIs is major depressive disorder; however, they are frequently prescribed for anxiety disorders, such as social anxiety disorder, generalized anxiety disorder, panic disorder, obsessive–compulsive disorder (OCD), eating disorders, chronic pain, and, in some cases, for posttraumatic stress disorder (PTSD). They are also frequently used to treat depersonalization disorder, although with varying results.
Depression
Antidepressants are recommended by the UK National Institute for Health and Care Excellence (NICE) as a first-line treatment of severe depression and for the treatment of mild-to-moderate depression that persists after conservative measures such as cognitive therapy. They recommend against their routine use by those who have chronic health problems and mild depression.
There has been controversy regarding the efficacy of SSRIs in treating depression depending on its severity and duration.
- Two meta-analyses published in 2008 (Kirsch) and 2010 (Fournier) found that in mild and moderate depression, the effect of SSRIs is small or none compared to placebo, while in very severe depression the effect of SSRIs is between "relatively small" and "substantial". The 2008 meta-analysis combined 35 clinical trials submitted to the Food and Drug Administration (FDA) before licensing of four newer antidepressants (including the SSRIs paroxetine and fluoxetine, the non-SSRI antidepressant nefazodone, and the serotonin and norepinephrine reuptake inhibitor (SNRI) venlafaxine). The authors attributed the relationship between severity and efficacy to a reduction of the placebo effect in severely depressed patients, rather than an increase in the effect of the medication. Some researchers have questioned the statistical basis of this study suggesting that it underestimates the effect size of antidepressants.
- A 2012 meta-analysis of fluoxetine and venlafaxine concluded that statistically and clinically significant treatment effects were observed for each drug relative to placebo irrespective of baseline depression severity; some of the authors however disclosed substantial relationships with pharmaceutical industries.
- A 2017 systematic review stated that "SSRIs versus placebo seem to have statistically significant effects on depressive symptoms, but the clinical significance of these effects seems questionable and all trials were at high risk of bias. Furthermore, SSRIs versus placebo significantly increase the risk of both serious and non-serious adverse events. Our results show that the harmful effects of SSRIs versus placebo for major depressive disorder seem to outweigh any potentially small beneficial effects". Fredrik Hieronymus et al. criticized the review as inaccurate and misleading, but they also disclosed multiple ties to pharmaceutical industries and receipt of speaker's fees.
- In 2018, a systematic review and network meta-analysis comparing the efficacy and acceptability of 21 antidepressant drugs showed escitalopram to be one of the most effective. They showed that "In terms of efficacy, all antidepressants were more effective than placebo, with odds ratios (ORs) ranging between 2.13 (95% credible interval 1.89–2.41) for amitriptyline and 1.37 (1.16–1.63) for reboxetine." The odds ratios were specifically in terms of response rates (≥50% reduction in observer-rated symptoms). Odds ratios of response rates have been criticized for artificially inflating the apparent size of antidepressant benefits.
The use of SSRIs in children with depression remains controversial. A 2021 Cochrane review concluded that, for children and adolescents, SSRIs "may reduce depression symptoms in a small and unimportant way compared with placebo." However, it also noted significant methodological limitations that make drawing definitive conclusions about efficacy difficult. Fluoxetine is the only SSRI authorized for use in children and adolescents with moderate to severe depression in the United Kingdom.
Social anxiety disorder
Some SSRIs are effective for social anxiety disorder, although their effects on symptoms is not always robust and their use is sometimes rejected in favor of psychological therapies. Paroxetine was the first drug to be approved for social anxiety disorder and it is considered effective for this disorder; sertraline and fluvoxamine were later approved for it as well. Escitalopram and citalopram are used off-label with acceptable efficacy, while fluoxetine is not considered to be effective for this disorder. The effect sizes (Cohen's d) of SSRIs in terms of improvement on the Liebowitz social anxiety scale in individual published trials of the drugs for social anxiety disorder have ranged from –0.029 to 1.214.
Post-traumatic stress disorder
PTSD is relatively hard to treat and generally treatment is not highly effective; SSRIs are no exception. They are not very effective for this disorder and only two SSRIs are FDA approved for this condition: paroxetine and sertraline. Paroxetine has slightly higher response and remission rates for PTSD than sertraline, but both are not fully effective for many patients. Fluoxetine is used off-label, but with mixed results; venlafaxine, an SNRI, is considered somewhat effective, although its use is also off-label. Fluvoxamine, escitalopram and citalopram are not well tested in this disorder. Paroxetine remains the most suitable drug for PTSD as of now, but with limited benefits.
Generalized anxiety disorder
SSRIs are recommended by the National Institute for Health and Care Excellence (NICE) for the treatment of generalized anxiety disorder (GAD) that has failed to respond to conservative measures such as education and self-help activities. GAD is a common disorder of which the central feature is excessive worry about a number of different events. Key symptoms include excessive anxiety about multiple events and issues, and difficulty controlling worrisome thoughts, that persists for at least 6 months.
Antidepressants provide a modest-to-moderate reduction in anxiety in GAD, and are superior to placebo in treating GAD. The efficacy of different antidepressants is similar.
Obsessive–compulsive disorder
In Canada, SSRIs are a first-line treatment of adult obsessive–compulsive disorder (OCD). In the UK, they are first-line treatment only with moderate to severe functional impairment and as second line treatment for those with mild impairment, though, as of early 2019, this recommendation is being reviewed. In children, SSRIs can be considered a second line therapy in those with moderate-to-severe impairment, with close monitoring for psychiatric adverse effects. SSRIs, especially fluvoxamine, which is the first one to be FDA approved for OCD, are efficacious in its treatment; patients treated with SSRIs are about twice as likely to respond to treatment as those treated with placebo. Efficacy has been demonstrated both in short-term treatment trials of 6 to 24 weeks and in discontinuation trials of 28 to 52 weeks duration.
Panic disorder
Paroxetine CR was superior to placebo on the primary outcome measure. In a 10-week randomized controlled, double-blind trial escitalopram was more effective than placebo. Fluvoxamine, another SSRI, has shown positive results. However, evidence for their effectiveness and acceptability is unclear.
Eating disorders
Antidepressants are recommended as an alternative or additional first step to self-help programs in the treatment of bulimia nervosa. SSRIs (fluoxetine in particular) are preferred over other anti-depressants due to their acceptability, tolerability, and superior reduction of symptoms in short-term trials. Long-term efficacy remains poorly characterized.
Similar recommendations apply to binge eating disorder. SSRIs provide short-term reductions in binge eating behavior, but have not been associated with significant weight loss.
Clinical trials have generated mostly negative results for the use of SSRIs in the treatment of anorexia nervosa. Treatment guidelines from the National Institute of Health and Clinical Excellence recommend against the use of SSRIs in this disorder. Those from the American Psychiatric Association note that SSRIs confer no advantage regarding weight gain, but that they may be used for the treatment of co-existing depression, anxiety, or OCD.
Stroke recovery
SSRIs have been used off-label in the treatment of stroke patients, including those with and without symptoms of depression. A 2021 meta-analysis of randomized controlled clinical trials found no evidence pointing to their routine use to promote recovery following stroke.
Premature ejaculation
Main article: Premature ejaculationSSRIs are effective for the treatment of premature ejaculation. Taking SSRIs on a chronic, daily basis is more effective than taking them prior to sexual activity. The increased efficacy of treatment when taking SSRIs on a daily basis is consistent with clinical observations that the therapeutic effects of SSRIs generally take several weeks to emerge. Sexual dysfunction ranging from decreased libido to anorgasmia is usually considered to be a significantly distressing side effect which may lead to noncompliance in patients receiving SSRIs. However, for those with premature ejaculation, this very same side effect becomes the desired effect.
Other uses
SSRIs such as sertraline have been found to be effective in decreasing anger.
Side effects
Side effects vary among the individual drugs of this class. They may include akathisia.
Sexual dysfunction
SSRIs can cause various types of sexual dysfunction such as anorgasmia, erectile dysfunction, diminished libido, genital numbness, and sexual anhedonia (pleasureless orgasm). Sexual problems are common with SSRIs. Poor sexual function is one of the most common reasons people stop the medication.
The mechanism by which SSRIs may cause sexual side effects is not well understood as of 2021. The range of possible mechanisms includes (1) nonspecific neurological effects (e.g., sedation) that globally impair behavior including sexual function; (2) specific effects on brain systems mediating sexual function; (3) specific effects on peripheral tissues and organs, such as the penis, that mediate sexual function; and (4) direct or indirect effects on hormones mediating sexual function. Management strategies include: for erectile dysfunction the addition of a PDE5 inhibitor such as sildenafil; for decreased libido, possibly adding or switching to bupropion; and for overall sexual dysfunction, switching to nefazodone. Buspirone is sometimes used off-label to reduce sexual dysfunction associated with the use of SSRIs.
A number of non-SSRI drugs are not associated with sexual side effects (such as bupropion, mirtazapine, tianeptine, agomelatine, tranylcypromine, and moclobemide).
Several studies have suggested that SSRIs may adversely affect semen quality.
While trazodone (an antidepressant with alpha adrenergic receptor blockade) is a notorious cause of priapism, cases of priapism have also been reported with certain SSRIs (e.g. fluoxetine, citalopram).
Post-SSRI sexual dysfunction
Post-SSRI sexual dysfunction (PSSD) refers to a set of symptoms reported by some people who have taken SSRIs or other serotonin reuptake-inhibiting (SRI) drugs, in which sexual dysfunction symptoms persist for at least three months after ceasing to take the drug. The status of PSSD as a legitimate and distinct pathology is contentious; several researchers have proposed that it should be recognized as a separate phenomenon from more common SSRI side effects.
The reported symptoms of PSSD include reduced sexual desire or arousal, erectile dysfunction in males or loss of vaginal lubrication in females, difficulty having an orgasm or loss of pleasurable sensation associated with orgasm, and a reduction or loss of sensitivity in the genitals or other erogenous zones. Additional non-sexual symptoms are also commonly described, including emotional numbing, anhedonia, depersonalization or derealization, and cognitive impairment. The duration of PSSD symptoms appears to vary among patients, with some cases resolving in months and others in years or decades; one analysis of patient reports submitted between 1992 and 2021 in the Netherlands listed a case which had reportedly persisted for 23 years. The symptoms of PSSD are largely shared with post-finasteride syndrome (PFS) and post-retinoid sexual dysfunction (PRSD), two other poorly-understood conditions which have been suggested to share a common etiology with PSSD despite being associated with different types of medication.
Diagnostic criteria for PSSD were proposed in 2022, but as of 2023, there is no agreement on standards for diagnosis. It is considered a distinct phenomenon from antidepressant discontinuation syndrome, post-acute withdrawal syndrome, and major depressive disorder, and should be distinguished from sexual dysfunction associated with depression and persistent genital arousal disorder. There are limited treatment options for PSSD as of 2023 and no evidence that any individual approach is effective. The mechanism by which SRIs may induce PSSD is unclear; neurobiological and cognitive factors may act in combination to cause the problem. As of 2023, prevalence is unknown. A 2020 review stated that PSSD is rare, underreported, and "increasingly identified in online communities". A 2024 study investigating the prevalence of persistent post-treatment genital numbness among sexual and gender minority youth found 13.2% of SSRI users between the ages 15 and 29 reporting the symptom compared to 0.9% who had used other medications.
Reports of PSSD have occurred with almost every SSRI (dapoxetine is an exception). In 2019, the Pharmacovigilance Risk Assessment Committee of the European Medicines Agency (EMA) recommended that packaging leaflets of selected SSRIs and SNRIs should be amended to include information regarding a possible risk of persistent sexual dysfunction. Following the EMA assessment, a safety review by Health Canada "could neither confirm nor rule out a causal link ... which was long lasting in rare cases", but recommended that "healthcare professionals inform patients about the potential risk of long-lasting sexual dysfunction despite discontinuation of treatment". A 2023 review stated that ongoing sexual dysfunction after SSRI discontinuation was possible, but that cause and effect were undetermined. The 2023 review cautioned that reports of sexual dysfunction cannot be generalized to wider practice as they are subject to a "high risk of bias", but agreed with the EMA assessment that cautionary labeling on SSRIs was warranted.
On the 20th of march of 2024, a lawsuit was filed by the organization Public Citizen, representing Dr. Antonei Csoka, against the United States Food and Drug Administration (FDA) for failing to act on a citizen petition submitted in 2018. The petition seeks to have the risk of serious sexual side effects persisting after discontinuation mentioned in the product labels of SSRIs and SNRIs.
Emotional blunting
Certain antidepressants may cause emotional blunting, characterized by reduced intensity of both positive and negative emotions as well as symptoms of apathy, indifference, and amotivation. It may be experienced as either beneficial or detrimental depending on the situation. This side effect has been particularly associated with serotonergic antidepressants like SSRIs and SNRIs, but may be less with atypical antidepressants like bupropion, agomelatine, and vortioxetine. Higher doses of antidepressants seem to be more likely to produce emotional blunting than lower doses. It can be decreased by reducing dosage, discontinuing the medication, or switching to a different antidepressant that may have less propensity for causing this side effect.
Vision
Acute narrow-angle glaucoma is the most common and important ocular side effect of SSRIs, and often goes misdiagnosed.
Cardiac
SSRIs do not appear to affect the risk of coronary heart disease (CHD) in those without a previous diagnosis of CHD. A large cohort study suggested no substantial increase in the risk of cardiac malformations attributable to SSRI usage during the first trimester of pregnancy. A number of large studies of people without known pre-existing heart disease have reported no EKG changes related to SSRI use. The recommended maximum daily dose of citalopram and escitalopram was reduced due to concerns with QT prolongation. In overdose, fluoxetine has been reported to cause sinus tachycardia, myocardial infarction, junctional rhythms, and trigeminy. Some authors have suggested electrocardiographic monitoring in patients with severe pre-existing cardiovascular disease who are taking SSRIs.
In a 2023 study a possible connection between SSRI usage and the onset of mitral valve regurgitation was identified, indicating that SSRIs could hasten the progression of degenerative mitral valve regurgitation (DMR), especially in individuals carrying 5-HTTLPR genotype. The study’s authors suggest that genotyping should be performed on people with DMR to evaluate serotonin transporter (SERT) activity. They also urge practitioners to exercise caution when prescribing SSRIs to individuals with a familial history of DMR.
Bleeding
SSRIs directly increase the risk of abnormal bleeding by lowering platelet serotonin levels, which are essential to platelet-driven hemostasis. SSRIs interact with anticoagulants, like warfarin, and antiplatelet drugs, like aspirin. This includes an increased risk of GI bleeding, and post operative bleeding. The relative risk of intracranial bleeding is increased, but the absolute risk is very low. SSRIs are known to cause platelet dysfunction. This risk is greater in those who are also on anticoagulants, antiplatelet agents and NSAIDs (nonsteroidal anti-inflammatory drugs), as well as with the co-existence of underlying diseases such as cirrhosis of the liver or liver failure.
Fracture risk
Evidence from longitudinal, cross-sectional, and prospective cohort studies suggests an association between SSRI usage at therapeutic doses and a decrease in bone mineral density, as well as increased fracture risk, a relationship that appears to persist even with adjuvant bisphosphonate therapy. However, because the relationship between SSRIs and fractures is based on observational data as opposed to prospective trials, the phenomenon is not definitively causal. There also appears to be an increase in fracture-inducing falls with SSRI use, suggesting the need for increased attention to fall risk in elderly patients using the medication. The loss of bone density does not appear to occur in younger patients taking SSRIs.
Bruxism
SSRI and SNRI antidepressants may cause jaw pain/jaw spasm reversible syndrome (although it is not common). Buspirone appears to be successful in treating bruxism on SSRI/SNRI induced jaw clenching.
Serotonin syndrome
Main article: Serotonin syndromeSerotonin syndrome is typically caused by the use of two or more serotonergic drugs, including SSRIs. Serotonin syndrome is a condition that can range from mild (most common) to deadly. Mild symptoms may consist of increased heart rate, fever, shivering, sweating, dilated pupils, myoclonus (intermittent jerking or twitching), as well as hyperreflexia. Concomitant use of SSRIs or SNRIs for depression with a triptan for migraine does not appear to heighten the risk of the serotonin syndrome. Taking monoamine oxidase inhibitors (MAOIs) in combination with SSRIs can be fatal, since MAOIs disrupt monoamine oxidase, an enzyme which is needed to break down serotonin and other neurotransmitters. Without monoamine oxidase, the body is unable to eliminate excess neurotransmitters, allowing them to build up to dangerous levels. The prognosis for recovery in a hospital setting is generally good if serotonin syndrome is correctly identified. Treatment consists of discontinuing any serotonergic drugs and providing supportive care to manage agitation and hyperthermia, usually with benzodiazepines.
Suicide risk
Children and adolescents
Meta analyses of short duration randomized clinical trials have found that SSRI use is related to a higher risk of suicidal behavior in children and adolescents. For instance, a 2004 U.S. Food and Drug Administration (FDA) analysis of clinical trials on children with major depressive disorder found statistically significant increases of the risks of "possible suicidal ideation and suicidal behavior" by about 80%, and of agitation and hostility by about 130%. According to the FDA, the heightened risk of suicidality is within the first one to two months of treatment. The National Institute for Health and Care Excellence (NICE) places the excess risk in the "early stages of treatment". The European Psychiatric Association places the excess risk in the first two weeks of treatment and, based on a combination of epidemiological, prospective cohort, medical claims, and randomized clinical trial data, concludes that a protective effect dominates after this early period. A 2014 Cochrane review found that at six to nine months, suicidal ideation remained higher in children treated with antidepressants compared to those treated with psychological therapy.
A recent comparison of aggression and hostility occurring during treatment with fluoxetine to placebo in children and adolescents found that no significant difference between the fluoxetine group and a placebo group. There is also evidence that higher rates of SSRI prescriptions are associated with lower rates of suicide in children, though since the evidence is correlational, the true nature of the relationship is unclear.
In 2004, the Medicines and Healthcare products Regulatory Agency (MHRA) in the United Kingdom judged fluoxetine (Prozac) to be the only antidepressant that offered a favorable risk-benefit ratio in children with depression, though it was also associated with a slight increase in the risk of self-harm and suicidal ideation. Only two SSRIs are licensed for use with children in the UK, sertraline (Zoloft) and fluvoxamine (Luvox), for the treatment of obsessive–compulsive disorder. Fluoxetine is not licensed for this use.
Adults
It is unclear whether SSRIs affect the risk of suicidal behavior in adults.
- A 2005 meta-analysis of drug company data found no evidence that SSRIs increased the risk of suicide; however, important protective or hazardous effects could not be excluded.
- A 2005 review observed that suicide attempts are increased in those who use SSRIs as compared to placebo and compared to therapeutic interventions other than tricyclic antidepressants. No difference risk of suicide attempts was detected between SSRIs versus tricyclic antidepressants.
- A 2006 review suggests that the widespread use of antidepressants in the new "SSRI-era" appears to have led to a highly significant decline in suicide rates in most countries with traditionally high baseline suicide rates. The decline is particularly striking for women who, compared with men, seek more help for depression. Recent clinical data on large samples in the US too have revealed a protective effect of antidepressant against suicide.
- A 2006 meta-analysis of randomized controlled trials suggests that SSRIs increase suicide ideation compared with placebo. However, the observational studies suggest that SSRIs did not increase suicide risk more than older antidepressants. The researchers stated that if SSRIs increase suicide risk in some patients, the number of additional deaths is very small because ecological studies have generally found that suicide mortality has declined (or at least not increased) as SSRI use has increased.
- An additional meta-analysis by the FDA in 2006 found an age-related effect of SSRI's. Among adults younger than 25 years, results indicated that there was a higher risk for suicidal behavior. For adults between 25 and 64, the effect appears neutral on suicidal behavior but possibly protective for suicidal behavior for adults between the ages of 25 and 64. For adults older than 64, SSRI's seem to reduce the risk of both suicidal behavior.
- In 2016 a study criticized the effects of the FDA Black Box suicide warning inclusion in the prescription. The authors discussed the suicide rates might increase also as a consequence of the warning.
Risk of death
A 2017 meta-analysis found that antidepressants including SSRIs were associated with significantly increased risk of death (+33%) and new cardiovascular complications (+14%) in the general population. Conversely, risks were not greater in people with existing cardiovascular disease.
Pregnancy and breastfeeding
SSRI use in pregnancy has been associated with a variety of risks with varying degrees of proof of causation. As depression is independently associated with negative pregnancy outcomes, determining the extent to which observed associations between antidepressant use and specific adverse outcomes reflects a causative relationship has been difficult in some cases. In other cases, the attribution of adverse outcomes to antidepressant exposure seems fairly clear.
SSRI use in pregnancy is associated with an increased risk of spontaneous abortion of about 1.7-fold. Use is also associated with preterm birth. According to some researches, decreased body weight of the child, intrauterine growth retardation, neonatal adaptive syndrome, and persistent pulmonary hypertension also was noted.
A systematic review of the risk of major birth defects in antidepressant-exposed pregnancies found a small increase (3% to 24%) in the risk of major malformations and a risk of cardiovascular birth defects that did not differ from non-exposed pregnancies. Other studies have found an increased risk of cardiovascular birth defects among depressed mothers not undergoing SSRI treatment, suggesting the possibility of ascertainment bias, e.g. that worried mothers may pursue more aggressive testing of their infants. Another study found no increase in cardiovascular birth defects and a 27% increased risk of major malformations in SSRI exposed pregnancies.
The FDA issued a statement on July 19, 2006, stating nursing mothers on SSRIs must discuss treatment with their physicians. However, the medical literature on the safety of SSRIs has determined that some SSRIs like Sertraline and Paroxetine are considered safe for breastfeeding.
Neonatal abstinence syndrome
Several studies have documented neonatal abstinence syndrome, a syndrome of neurological, gastrointestinal, autonomic, endocrine and/or respiratory symptoms among a large minority of infants with intrauterine exposure. These syndromes are short-lived, but insufficient long-term data is available to determine whether there are long-term effects.
Persistent pulmonary hypertension
Persistent pulmonary hypertension (PPHN) is a serious and life-threatening, but very rare, lung condition that occurs soon after birth of the newborn. Newborn babies with PPHN have high pressure in their lung blood vessels and are not able to get enough oxygen into their bloodstream. About 1 to 2 babies per 1000 babies born in the U.S. develop PPHN shortly after birth, and often they need intensive medical care. It is associated with about a 25% risk of significant long-term neurological deficits. A 2014 meta analysis found no increased risk of persistent pulmonary hypertension associated with exposure to SSRI's in early pregnancy and a slight increase in risk associates with exposure late in pregnancy; "an estimated 286 to 351 women would need to be treated with an SSRI in late pregnancy to result in an average of one additional case of persistent pulmonary hypertension of the newborn". A review published in 2012 reached conclusions very similar to those of the 2014 study.
Neuropsychiatric effects in offspring
According to a 2015 review available data found that "some signal exists suggesting that antenatal exposure to SSRIs may increase the risk of ASDs (autism spectrum disorders)" even though a large cohort study published in 2013 and a cohort study using data from Finland's national register between the years 1996 and 2010 and published in 2016 found no significant association between SSRI use and autism in offspring. The 2016 Finland study also found no association with ADHD, but did find an association with increased rates of depression diagnoses in early adolescence.
Bipolar switch
In adults and children with bipolar disorder, SSRIs may cause a bipolar switch from depression into hypomania/mania, mixed states or rapid cycling. When taken with mood stabilizers, the risk of switching is not increased, however when taking SSRIs as a monotherapy, the risk of switching may be twice or three times that of the average. The changes are not often easy to detect and require monitoring by family and mental health professionals. This switch might happen even with no prior (hypo)manic episodes and might therefore not be foreseen by the psychiatrist.
Interactions
The following drugs may precipitate serotonin syndrome in people on SSRIs:
- Linezolid
- Monoamine oxidase inhibitors (MAOIs) including moclobemide, phenelzine, tranylcypromine, selegiline and methylene blue
- Lithium
- Sibutramine
- MDMA (ecstasy)
- Dextromethorphan
- Tramadol
- 5-HTP
- Pethidine/meperidine
- St. John's wort
- Yohimbe
- Tricyclic antidepressants (TCAs)
- Serotonin-norepinephrine reuptake inhibitors (SNRIs)
- Buspirone
- Triptan
- Mirtazapine
- Methylene blue
Painkillers of the NSAIDs drug family may interfere and reduce efficiency of SSRIs and may compound the increased risk of gastrointestinal bleeds caused by SSRI use. NSAIDs include:
There are a number of potential pharmacokinetic interactions between the various individual SSRIs and other medications. Most of these arise from the fact that every SSRI has the ability to inhibit certain P450 cytochrome enzymes.
Drug name | CYP1A2 | CYP2C9 | CYP2C19 | CYP2D6 | CYP3A4 | CYP2B6 |
---|---|---|---|---|---|---|
Citalopram | + | 0 | 0 | + | 0 | 0 |
Escitalopram | 0 | 0 | 0 | + | 0 | 0 |
Fluoxetine | + | ++ | +/++ | +++ | + | + |
Fluvoxamine | +++ | ++ | +++ | + | + | + |
Paroxetine | + | + | + | +++ | + | +++ |
Sertraline | + | + | +/++ | + | + | + |
Legend:
0 – no inhibition
+ – mild/weak inhibition
++ – moderate inhibition
+++ – strong/potent inhibition
The CYP2D6 enzyme is entirely responsible for the metabolism of hydrocodone, codeine and dihydrocodeine to their active metabolites (hydromorphone, morphine, and dihydromorphine, respectively), which in turn undergo phase 2 glucuronidation. These opioids (and to a lesser extent oxycodone, tramadol, and methadone) have interaction potential with selective serotonin reuptake inhibitors. The concomitant use of some SSRIs (paroxetine and fluoxetine) with codeine may decrease the plasma concentration of active metabolite morphine, which may result in reduced analgesic efficacy.
Another important interaction of certain SSRIs involves paroxetine, a potent inhibitor of CYP2D6, and tamoxifen, an agent used commonly in the treatment and prevention of breast cancer. Tamoxifen is a prodrug that is metabolised by the hepatic cytochrome P450 enzyme system, especially CYP2D6, to its active metabolites. Concomitant use of paroxetine and tamoxifen in women with breast cancer is associated with a higher risk of death, as much as a 91 percent in women who used it the longest.
Overdose
See also: Serotonin syndromeSSRIs appear safer in overdose when compared with traditional antidepressants, such as the tricyclic antidepressants. This relative safety is supported both by case series and studies of deaths per numbers of prescriptions. However, case reports of SSRI poisoning have indicated that severe toxicity can occur and deaths have been reported following massive single ingestions, although this is exceedingly uncommon when compared to the tricyclic antidepressants.
Because of the wide therapeutic index of the SSRIs, most patients will have mild or no symptoms following moderate overdoses. The most commonly reported severe effect following SSRI overdose is serotonin syndrome; serotonin toxicity is usually associated with very high overdoses or multiple drug ingestion. Other reported significant effects include coma, seizures, and cardiac toxicity.
Poisoning is also known in animals, and some toxicity information is available for veterinary treatment.
Discontinuation syndrome
Main article: SSRI discontinuation syndromeSerotonin reuptake inhibitors should not be abruptly discontinued after extended therapy, and whenever possible, should be tapered over several weeks to minimize discontinuation-related symptoms which may include nausea, headache, dizziness, chills, body aches, paresthesias, insomnia, and brain zaps. Paroxetine may produce discontinuation-related symptoms at a greater rate than other SSRIs, though qualitatively similar effects have been reported for all SSRIs. Discontinuation effects appear to be less for fluoxetine, perhaps owing to its long half-life and the natural tapering effect associated with its slow clearance from the body. One strategy for minimizing SSRI discontinuation symptoms is to switch the patient to fluoxetine and then taper and discontinue the fluoxetine.
Mechanism of action
See also: Pharmacology of antidepressantsSerotonin reuptake inhibition
In the brain, messages are passed from a nerve cell to another via a chemical synapse, a small gap between the cells. The presynaptic cell that sends the information releases neurotransmitters including serotonin into that gap. The neurotransmitters are then recognized by receptors on the surface of the recipient postsynaptic cell, which upon this stimulation, in turn, relays the signal. About 10% of the neurotransmitters are lost in this process; the other 90% are released from the receptors and taken up again by monoamine transporters into the sending presynaptic cell, a process called reuptake.
SSRIs inhibit the reuptake of serotonin. As a result, the serotonin stays in the synaptic gap longer than it normally would, and may repeatedly stimulate the receptors of the recipient cell. In the short run, this leads to an increase in signaling across synapses in which serotonin serves as the primary neurotransmitter. On chronic dosing, the increased occupancy of post-synaptic serotonin receptors signals the pre-synaptic neuron to synthesize and release less serotonin. Serotonin levels within the synapse drop, then rise again, ultimately leading to downregulation of post-synaptic serotonin receptors. Other, indirect effects may include increased norepinephrine output, increased neuronal cyclic AMP levels, and increased levels of regulatory factors such as BDNF and CREB. Owing to the lack of a widely accepted comprehensive theory of the biology of mood disorders, there is no widely accepted theory of how these changes lead to the mood-elevating and anti-anxiety effects of SSRIs.
Their effects on serotonin blood levels, which take weeks to take effect, appear to be largely responsible for their slow-to-appear psychiatric effects. SSRIs mediate their action largely with high occupancy in a total of all serotonin transporters within the brain and through this slow downstream changes of large brain regions at therapeutic concentrations, whereas MDMA leads to an excess serotonin release in a short run. This could explain the absence of a "high" by antidepressants and in addition the contrary ability of SSRIs in expressing neuroprotective actions to the neurotoxic abilities of MDMA.
Sigma receptor ligands
Medication | SERTTooltip Serotonin transporter | σ1 | σ2 | σ1 / SERT | |
---|---|---|---|---|---|
Citalopram | 1.16 | 292–404 | Agonist | 5,410 | 252–348 |
Escitalopram | 2.5 | 288 | Agonist | ND | ND |
Fluoxetine | 0.81 | 191–240 | Agonist | 16,100 | 296–365 |
Fluvoxamine | 2.2 | 17–36 | Agonist | 8,439 | 7.7–16.4 |
Paroxetine | 0.13 | ≥1,893 | ND | 22,870 | ≥14,562 |
Sertraline | 0.29 | 32–57 | Antagonist | 5,297 | 110–197 |
Values are Ki (nM). The smaller the value, the more strongly the drug binds to the site. |
In addition to their actions as reuptake inhibitors of serotonin, some SSRIs are also, coincidentally, ligands of the sigma receptors. Fluvoxamine is an agonist of the σ1 receptor, while sertraline is an antagonist of the σ1 receptor, and paroxetine does not significantly interact with the σ1 receptor. None of the SSRIs have significant affinity for the σ2 receptor. Fluvoxamine has by far the strongest activity of the SSRIs at the σ1 receptor. High occupancy of the σ1 receptor by clinical dosages of fluvoxamine has been observed in the human brain in positron emission tomography (PET) research. It is thought that agonism of the σ1 receptor by fluvoxamine may have beneficial effects on cognition. In contrast to fluvoxamine, the relevance of the σ1 receptor in the actions of the other SSRIs is uncertain and questionable due to their very low affinity for the receptor relative to the SERT.
Anti-inflammatory effects
The role of inflammation and the immune system in depression has been extensively studied. The evidence supporting this link has been shown in numerous studies over the past ten years. Nationwide studies and meta-analyses of smaller cohort studies have uncovered a correlation between pre-existing inflammatory conditions such as type 1 diabetes, rheumatoid arthritis (RA), or hepatitis, and an increased risk of depression. Data also shows that using pro-inflammatory agents in the treatment of diseases like melanoma can lead to depression. Several meta-analytical studies have found increased levels of proinflammatory cytokines and chemokines in depressed patients. This link has led scientists to investigate the effects of antidepressants on the immune system.
SSRIs were originally invented with the goal of increasing levels of available serotonin in the extracellular spaces. However, the delayed response between when patients first begin SSRI treatment to when they see effects has led scientists to believe that other molecules are involved in the efficacy of these drugs. To investigate the apparent anti-inflammatory effects of SSRIs, both Kohler et al. and Więdłocha et al. conducted meta-analyses which have shown that after antidepressant treatment the levels of cytokines associated with inflammation are decreased. A large cohort study conducted by researchers in the Netherlands investigated the association between depressive disorders, symptoms, and antidepressants with inflammation. The study showed decreased levels of interleukin (IL)-6, a cytokine that has proinflammatory effects, in patients taking SSRIs compared to non-medicated patients.
Treatment with SSRIs has shown reduced production of inflammatory cytokines such as IL-1β, tumor necrosis factor (TNF)-α, IL-6, and interferon (IFN)-γ, which leads to a decrease in inflammation levels and subsequently a decrease in the activation level of the immune response. These inflammatory cytokines have been shown to activate microglia which are specialized macrophages that reside in the brain. Macrophages are a subset of immune cells responsible for host defense in the innate immune system. Macrophages can release cytokines and other chemicals to cause an inflammatory response. Peripheral inflammation can induce an inflammatory response in microglia and can cause neuroinflammation. SSRIs inhibit proinflammatory cytokine production which leads to less activation of microglia and peripheral macrophages. SSRIs not only inhibit the production of these proinflammatory cytokines, they also have been shown to upregulate anti-inflammatory cytokines such as IL-10. Taken together, this reduces the overall inflammatory immune response.
In addition to affecting cytokine production, there is evidence that treatment with SSRIs has effects on the proliferation and viability of immune system cells involved in both innate and adaptive immunity. Evidence shows that SSRIs can inhibit proliferation in T-cells, which are important cells for adaptive immunity and can induce inflammation. SSRIs can also induce apoptosis, programmed cell death, in T-cells. The full mechanism of action for the anti-inflammatory effects of SSRIs is not fully known. However, there is evidence for various pathways to have a hand in the mechanism. One such possible mechanism is the increased levels of cyclic adenosine monophosphate (cAMP) as a result of interference with activation of protein kinase A (PKA), a cAMP dependent protein. Other possible pathways include interference with calcium ion channels, or inducing cell death pathways like MAPK and Notch signaling pathway.
The anti-inflammatory effects of SSRIs have prompted studies of the efficacy of SSRIs in the treatment of autoimmune diseases such as multiple sclerosis, RA, inflammatory bowel diseases, and septic shock. These studies have been performed in animal models but have shown consistent immune regulatory effects. Fluoxetine, an SSRI, has also shown efficacy in animal models of graft vs. host disease. SSRIs have also been used successfully as pain relievers in patients undergoing oncology treatment. The effectiveness of this has been hypothesized to be at least in part due to the anti-inflammatory effects of SSRIs.
Pharmacogenetics
Further information: PharmacogeneticsLarge bodies of research are devoted to using genetic markers to predict whether patients will respond to SSRIs or have side effects that will cause their discontinuation, although these tests are not yet ready for widespread clinical use.
Versus TCAs
SSRIs are described as 'selective' because they affect only the reuptake pumps responsible for serotonin, as opposed to earlier antidepressants, which affect other monoamine neurotransmitters as well, and as a result, SSRIs have fewer side effects.
There appears to be no significant difference in effectiveness between SSRIs and tricyclic antidepressants, which were the most commonly used class of antidepressants before the development of SSRIs. However, SSRIs have the important advantage that their toxic dose is high, and, therefore, they are much more difficult to use as a means to commit suicide. Further, they have fewer and milder side effects. Tricyclic antidepressants also have a higher risk of serious cardiovascular side effects, which SSRIs lack.
SSRIs act on signal pathways such as cyclic adenosine monophosphate (cAMP) on the postsynaptic neuronal cell, which leads to the release of brain-derived neurotrophic factor (BDNF). BDNF enhances the growth and survival of cortical neurons and synapses.
Pharmacokinetics
SSRIs vary in their pharmacokinetic properties.
SSRI | FTooltip Bioavailability (%) | VdTooltip Volume of distribution (L/kg) | logPTooltip Partition coefficient | PPBTooltip Plasma protein binding (%) | Major metabolic enzymes (additional) | t1/2Tooltip Elimination half-life (h) | Dose (mg) | Levels (ng/mL) |
---|---|---|---|---|---|---|---|---|
Citalopram | 80 | 12 | 3.76 | 80 | CYP2C19, CYP3A4 (CYP2D6) | 35 | 20–40 | 50–110 |
Escitalopram | 80 | 12 | 3.5 | 56 | CYP3A4, CYP2C19 | 27–32 | 10–20 | 15–80 |
Fluoxetine | 60–80 | 20–45 | 4.05 | 95 | CYP2D6, CYP2C9 (CYP2C19) | 24–96 | 20–60 | 120–500 |
Fluvoxamine | 53 | 25 | 2.89 | 77 | CYP2D6 (CYP1A2) | 12–15 | 50–300 | 60–230 |
Paroxetine | 50–90 | 17 | 3.6 | 95 | CYP2D6 | 21 | 20–50 | 30–120 |
Sertraline | 80–95 | 20 | 5.1 | 98 | CYP2B6 (CYP2C19, CYP3A4, CYP2D6) | 25–26 | 50–200 | 10–150 |
List of SSRIs
Marketed
Antidepressants
- Citalopram (Celexa)
- Escitalopram (Lexapro)
- Fluoxetine (Prozac)
- Fluvoxamine (Luvox)
- Paroxetine (Paxil)
- Sertraline (Zoloft)
Citalopram | Escitalopram | Fluoxetine | Fluvoxamine | Paroxetine | Sertraline |
Others
- Dapoxetine (Priligy)
Dapoxetine |
Discontinued
Antidepressants
- Indalpine (Upstène)
- Zimelidine (Zelmid)
Indalpine | Zimelidine |
Never marketed
Antidepressants
- Alaproclate (GEA-654)
- Centpropazine
- Cericlamine (JO-1017)
- Femoxetine (Malexil; FG-4963)
- Ifoxetine (CGP-15210)
- Omiloxetine
- Panuramine (WY-26002)
- Pirandamine (AY-23713)
- Seproxetine ((S)-norfluoxetine)
Alaproclate | Cericlamine | Femoxetine | Ifoxetine | Omiloxetine | Panuramine | Pirandamine | Seproxetine |
Related drugs
Although described as SNRIs, duloxetine (Cymbalta), venlafaxine (Effexor), and desvenlafaxine (Pristiq) are in fact relatively selective as serotonin reuptake inhibitors (SRIs). They are about at least 10-fold selective for inhibition of serotonin reuptake over norepinephrine reuptake. The selectivity ratios are approximately 1:30 for venlafaxine, 1:10 for duloxetine, and 1:14 for desvenlafaxine. At low doses, these SNRIs act mostly as SSRIs; only at higher doses do they also prominently inhibit norepinephrine reuptake. Milnacipran (Ixel, Savella) and its stereoisomer levomilnacipran (Fetzima) are the only widely marketed SNRIs that inhibit serotonin and norepinephrine to similar degrees, both with ratios close to 1:1.
Vilazodone (Viibryd) and vortioxetine (Trintellix) are SRIs that also act as modulators of serotonin receptors and are described as serotonin modulators and stimulators (SMS). Vilazodone is a 5-HT1A receptor partial agonist while vortioxetine is a 5-HT1A receptor agonist and 5-HT3 and 5-HT7 receptor antagonist. Litoxetine (SL 81–0385) and lubazodone (YM-992, YM-35995) are similar drugs that were never marketed. They are SRIs and litoxetine is also a 5-HT3 receptor antagonist while lubazodone is also a 5-HT2A receptor antagonist.
History
See also: Development and discovery of SSRI drugsZimelidine was introduced in 1982 and was the first SSRI to be sold. Despite its efficacy, statistically significant increase in cases of Guillain–Barré syndrome among treated patients led to its withdrawal in 1983. Fluoxetine, introduced in 1987 is commonly thought the first SSRI to be marketed.
Controversy
See also: Biopsychiatry controversy and Biological psychiatryA study examining publication of results from FDA-evaluated antidepressants concluded that those with favorable results were much more likely to be published than those with negative results. Furthermore, an investigation of 185 meta-analyses on antidepressants found that 79% of them had authors affiliated in some way to pharmaceutical companies and that they were reluctant to report caveats for antidepressants.
David Healy has argued that warning signs were available for many years prior to regulatory authorities moving to put warnings on antidepressant labels that they might cause suicidal thoughts. At the time these warnings were added, others argued that the evidence for harm remained unpersuasive and others continued to do so after the warnings were added.
In other organisms
SSRIs are common environmental contaminant findings near human settlement.
Veterinary use
An SSRI (fluoxetine) has been approved for veterinary use in treatment of canine separation anxiety.
See also
- List of antidepressants
- Noradrenergic and specific serotonergic antidepressant
- Serotonin releasing agent (SRA)
- Serotonin–norepinephrine reuptake inhibitor (SNRI)
- Serotonin–norepinephrine–dopamine reuptake inhibitor (SNDRI)
- Dapoxetine
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