Full form of HIV is human immunodeficiency virus. There are two therapy’s developed for HIV they are1. Standard antiretroviral therapy (ART) this therapy consists of three antiretroviral drugs.it stops the progression of HIV disease. Antiretroviral are separated into different classes. The classes are nucleoside /nucleotide reverse transcript inhibitors, on nucleoside reverse transcript inhibitors, protease inhibitors, fusion inhibitors, integrase inhibitors, fixed dose combination. 2. Highly Active Antiretroviral Therapy (HARRT): It combines three or more different drugs such as two nucleoside reverse transcriptase inhibitors (NRTIs) and a protease inhibitor (PI), two NRTIs and a non-nucleoside reverse transcriptase inhibitor (NNRTI).this therapy reduce the amount of active virus and the number of active virus until it is undetectable by current blood testing techniques .some medicines are available for HIV it gives boost to immune system.