Lamivudine is a drug used to treat HIV. In general, lamivudine alone cannot be used for the treatment of AIDS, but should be combined with other antiviral drugs. Lamivudine can also be used as an antiviral drug for hepatitis B at a dose of 0.1 g. For hepatitis B, lamivudine is not the preferred antiviral drug. Tenofovir. However, lamivudine can also be used. The resistance rate of lamivudine use is relatively high, especially for hepatitis B patients, so regular rechecking of hepatitis B DNA and other related indicators is needed to assess the efficacy.