Emfovir is an antiretroviral composition that contains Efavirenz, Emtricitabine, and Tenofovir Disoproxil Fumarate as its active ingredients. It is an anti-HIV regimen used to treat patients suffering from an infection caused by HIV (human immunodeficiency virus).tenofovir 300 mg medicine is also used to manage the signs and symptoms of AIDS (acquiredimmunodeficiency syndrome).