Tenofovir Alafenamide 25mg is an antiviral medication used primarily for the treatment of chronic hepatitis B virus (HBV) infection in adults and adolescents aged 12 years and older with compensated liver disease. It is a prodrug of tenofovir that delivers higher intracellular concentrations of the active metabolite with lower systemic exposure, resulting in potent antiviral activity and improved safety, especially for kidney and bone health. Tenofovir Alafenamide works by inhibiting HBV reverse transcriptase, leading to terminated viral DNA synthesis and preventing the virus from multiplying. It is taken orally, typically once daily, under medical supervision.