Epivir is a brand name for the antiretroviral drug zidovudine. It's used to treat HIV-1 infection, a virus that attacks the immune system.

Key features:

• Antiretroviral drug: Zidovudine is a nucleoside reverse transcriptase inhibitor (NRTI), which works by blocking the enzyme that HIV-1 uses to replicate itself.
• Oral administration: Epivir is taken by mouth, making it a relatively easy medication to use.
• Effective: Epivir has been shown to be effective in suppressing HIV-1 viral load to undetectable levels when used in combination with other antiretroviral drugs.
• Suitable for treatment-naive and treatment-experienced patients: Epivir can be used in both people who are newly diagnosed with HIV and those who have already received treatment.