What kind of medicine does Tenofovir Alafenamide Fumarate Tablets (Vemlidy) belong to and its mechanism of action?

Tenofovir alafenamide fumarate tablets (Vemlidy) is an oral antiviral drug that is a nucleotide reverse transcriptase inhibitor (Nucleotide Reverse Transcriptase Inhibitor, NtRTI). It is mainly used for the treatment of adult patients with chronic hepatitis B (CHB). It can effectively inhibit the replication of hepatitis B virus (HBV), thereby reducing liver inflammation and delaying the progression of liver fibrosis and cirrhosis. Because of its high safety and small impact on renal function and bone density, it is suitable for long-term maintenance treatment.

In terms of mechanism of action, tenofovir alafenamide fumarate tablets are rapidly hydrolyzed into tenofovir (Tenofovir) in the body, and are subsequently phosphorylated in hepatocytes into the active form - tenofovir diphosphate (Tenofovir diphosphate). The active substance competitively inhibits HBV DNApolymerase and can be embedded in the virus DNA chain being synthesized, causing the virus DNA chain elongation to terminate, thereby preventing virus replication. This mechanism allows the drug to effectively inhibit the reproduction of HBV at the molecular level.

Another important feature of tenofovir alafenamide fumarate tablets is high selectivity and good tolerance. It mainly acts on viral reverse transcriptase and has high selectivity for human DNA polymerase, so it has low toxicity to normal cells. In clinical trials, the drug showed significant virological response rates and improvements in liver function, while having a low incidence of adverse reactions. The most common side effects were mild headache, nausea, or slight fluctuations in renal function indicators, which can usually be managed without discontinuing the drug.

In addition, the medication strategy of tenofovir alafenamide fumarate tablets emphasizes long-term standardized use. Because hepatitis B is a chronic viral disease, patients usually need to take long-term or even lifelong medication to maintain viral suppression. Doctors will evaluate liver function, kidney function and accompanying diseases before treatment, and regularly monitor serum HBV DNA levels, liver function indicators and kidney function during medication to ensure the efficacy and safety of the drug. Through scientific and reasonable use, Veride can exert a stable and effective antiviral effect in the long-term management of hepatitis B.

Reference link:https://www.drugs.com