STD Treatment - Lamivudine in combination with other antiretroviral agents is indicated for the treatment of HIV infection. The use of Lamivudine is based on the results of clinical studies in HIV-infected patients in combination regimens with other antiretroviral agents. When you start taking HIV medicines, your immune system may get stronger and may begin to fight infections that have been hidden in your body, such as pneumonia, herpes virus, or tuberculosis. If you have new symptoms after starting your HIV medicines, be sure to tell your doctor