What is the trade name for tenofovir disoproxil fumarate?

Tenofovir disoproxil fumarate is marketed under the trade name Viread. This medication is an antiretroviral drug used in the treatment of HIV and chronic hepatitis B infections. Tenofovir disoproxil fumarate works by inhibiting reverse transcriptase, an enzyme critical for viral replication. The other trade names listed represent different medications:

Epivir (lamivudine) is another antiviral drug used to treat HIV but is not tenofovir. Emtriva (emtricitabine) is also used for HIV treatment and is distinct from tenofovir disoproxil fumarate. Zerit (stavudine) is an older HIV medication that acts differently and does not relate to tenofovir. Therefore, Viread is the correct identification for tenofovir disoproxil fumarate among the choices given.