Tenofomide is a medication belonging to the class of nucleoside reverse transcriptase inhibitors (NRTIs). It is primarily used in the treatment of HIV/AIDS, a viral infection caused by the human immunodeficiency virus (HIV). Tenofomide works by inhibiting the activity of an enzyme called reverse transcriptase, which is essential for the replication of HIV. By interfering with viral replication, Tenofomide helps reduce the viral load in the body and slows down the progression of HIV infection.