tenofovir, an antiretroviral agent. ▪ INDICATIONS: This drug is prescribed to treat HIV-1 infection with other antiretrovirals. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug prohibits its use. ▪ ADVERSE EFFECTS: Common adverse effects include headache, nausea, vomiting, diarrhea, flatulence, and abdominal pain.