Teevir Tablet is a prescription-only, fixed-dose combination antiretroviral medication manufactured by Mylan Pharmaceuticals (a Viatris company) used to treat HIV-1 infection in adults and adolescents. It combines three active ingredients—Emtricitabine, Tenofovir Disoproxil Fumarate, and Efavirenz—to reduce the amount of virus in the body and improve immune function.