Tenofovir alafenamide
Tenofovir alafenamide, sold under the brand name Vemlidy, is a hepatitis B virus nucleotide reverse transcriptase inhibitor for the treatment of chronic hepatitis B virus infection in adults with compensated liver disease. It is taken by mouth.
Tenofovir alafenamide is a prodrug of tenofovir. It was developed by Gilead Sciences based on the protide technology of Chris McGuigan for use in the treatment of HIV/AIDS and chronic hepatitis B, and is applied in the form of tenofovir alafenamide fumarate. Closely related to the commonly used reverse-transcriptase inhibitor tenofovir disoproxil fumarate, TAF has greater antiviral activity and better distribution into lymphoid tissues than that agent. Vemlidy was approved by the U.S. Food and Drug Administration in November 2016.
Gilead announced a Phase III clinical trial evaluating a single-tablet regimen combining tenofovir alafenamide with cobicistat, emtricitabine and elvitegravir and developed a coformulation of the drug with cobicistat, emtricitabine and the protease inhibitor darunavir. In a 48-week study comparing elvitegravir/cobicistat/emtricitabine/tenofovir disoproxil to elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide, the results showed the newer drug to be noninferior to the established agent, but at much lower dosages and with lower incidence of adverse side effects such as impaired kidney function. The FDA approved the TAF-based treatment regimen for treatment of HIV-1 in November 2015. Genvoya is the first TAF-based regimen to receive approval.Fixed-dose combinations containing tenofovir alafenamide
