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| Clinical data | |
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| Trade names | Harvoni (combination with sofosbuvir) |
| Other names | GS-5885 |
| License data | |
| Routes of administration | By mouth |
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| Pharmacokinetic data | |
| Bioavailability | 76% |
| Protein binding | >99% |
| Metabolism | No cytochrome metabolism |
| Elimination half-life | 47 hrs |
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| PubChem CID | |
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| CompTox Dashboard (EPA) | |
| Chemical and physical data | |
| Formula | C49H54F2N8O6 |
| Molar mass | 889.018 g·mol |
| 3D model (JSmol) | |
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Ledipasvir is a drug for the treatment of hepatitis C that was developed by Gilead Sciences. After completing Phase III clinical trials, on February 10, 2014, Gilead filed for U.S. approval of a ledipasvir/sofosbuvir fixed-dose combination tablet for genotype 1 hepatitis C. The ledipasvir/sofosbuvir combination is a direct-acting antiviral agent that interferes with HCV replication and can be used to treat patients with genotypes 1a or 1b without PEG-interferon or ribavirin.
Ledipasvir is an inhibitor of NS5A, a hepatitis C virus protein.
Data presented at the 20th Conference on Retroviruses and Opportunistic Infections in March 2013 showed that a triple regimen of the nucleotide analog inhibitor sofosbuvir, ledipasvir, and ribavirin produced a 12-week post-treatment sustained virological response (SVR12) rate of 100% for both treatment-naive patients and prior non-responders with HCV genotype 1. The sofosbuvir/ledipasvir coformulation is being tested with and without ribavirin. In February 2014 Gilead filed for United States Food and Drug Administration (FDA) approval of ledipasvir/sofosbuvir oral treatment, without interferon and ribavirin.
On 10 October 2014 the FDA approved the combination product ledipasvir/sofosbuvir called Harvoni.
Medical uses
Ledipasvir is most commonly used in combination with sofosbuvir for treatment in chronic hepatitis C genotype 1 patients. This drug has been tested and shown efficacy in treatment-naive and treatment experienced patients.
Adverse effects
According to clinical trials, ledipasvir/sofosbuvir has been very well tolerated with the most common side effects being fatigue and headache.
Interactions
Most drug-drug interactions with Harvoni involve Pgp-inducers such as St. John’s wort or rifampicin. Concomitant use will decrease the blood concentration of Harvoni and thus, have reduced therapeutic effects.
Mechanism of action
Ledipasvir inhibits an important viral phosphoprotein, NS5A, which is involved in viral replication, assembly, and secretion.
Sofosbuvir, on the other hand, is metabolized to a uridine triphosphate mimic, which acts as a RNA chain terminator when incorporated into RNA by NS5B polymerase.
Cost
Similar to sofosbuvir, the cost of Harvoni has been a controversial topic. It costs $1,125 per pill in the US, translating to $63,000 for an 8-week treatment course, $94,500 for a 12-week treatment course, or $189,000 for a 24-week treatment course. Gilead justifies the cost by outweighing the benefit of curing hepatitis C over the cost of spending double on liver transplants or temporarily treating liver diseases. Gilead has provided a ledipasvir/sofosbuvir assistance program for eligible underserved or underinsured hepatitis C patients who cannot afford the costs of treatment.
In July 2015 Gilead modified the eligibility criteria to receive Support Path benefits for HCV patients in the United States.
See also
References
- "Ledipasvir" (PDF). United States Adopted Name. Archived from the original (PDF) on 2016-01-31. Retrieved 2013-05-14.
- "Ledipasvir-submitted-to-FDA". Archived from the original on 2014-03-02. Retrieved 2014-04-03.
- "GS-5885". Gilead Sciences. Archived from the original on 2013-04-10. Retrieved 2013-03-08.
- ELECTRON: 100% Suppression of Viral Load through 4 Weeks’ Post-treatment for Sofosbuvir + Ledipasvir (GS-5885) + Ribavirin for 12 Weeks in Treatment-naïve and -experienced Hepatitis C Virus GT 1 Patients Archived 2013-03-23 at the Wayback Machine. Gane, Edward et al. 20th Conference on Retroviruses and Opportunistic Infections. March 3–6, 2013. Abstract 41LB.
- CROI 2013: Sofosbuvir + Ledipasvir + Ribavirin Combo for HCV Produces 100% Sustained Response Archived 2015-09-24 at the Wayback Machine. Highleyman, Liz. HIVandHepatitis.com. 4 March 2013.
- "Gilead Files for U.S. Approval of Ledipasvir/Sofosbuvir Fixed-Dose Combination Tablet for Genotype 1 Hepatitis C". Gilead Sciences. 10 February 2014. Archived from the original on 2 March 2014. Retrieved 14 March 2014.
- "U.S. Food and Drug Administration Approves Gilead's Harvoni (Ledipasvir/Sofosbuvir), the First Once-Daily Single Tablet Regimen for the Treatment of Genotype 1 Chronic Hepatitis C". 10 October 2014. Archived from the original on 12 October 2018. Retrieved 10 October 2014.
- Afdhal N, Zeuzem S, Kwo P, Chojkier M, Gitlin N, Puoti M, et al. (May 2014). "Ledipasvir and sofosbuvir for untreated HCV genotype 1 infection". The New England Journal of Medicine. 370 (20): 1889–98. doi:10.1056/NEJMoa1402454. hdl:2445/118704. PMID 24725239.
- ^ "PRESCRIBING INFORMATION" (PDF). www.gilead.com. Retrieved 2019-06-12.
- ^ "Ledipasvir-Sofosbuvir Harvoni - Treatment - Hepatitis C Online". www.hepatitisc.uw.edu.
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