Antiretroviral adjective refers to drugs used in treating retrovirus infections such as HIV. These drugs inhibit viral replication by targeting different stages of the virus's life cycle. Some synonyms for antiretroviral adjective include antiviral, anti-HIV, and retrovirus-inhibiting. Antiviral drugs are used to treat several viral infections by interfering with the virus's ability to enter cells or replicate. Similarly, anti-HIV drugs target specific stages of the HIV life cycle to prevent the virus from multiplying. Retrovirus-inhibiting drugs act on the reverse transcriptase enzyme that retroviruses use to copy their RNA into DNA. These different synonymous terms describe the same class of drugs used to combat retrovirus infections.