No cure for AIDS has been discovered till date. Treatment of AIDS with drugs is called anti-retroviral therapy or ART. In the treatment of AIDS, the Food and Drug Administration-FDA (USA) recommends taking two groups of drugs together. This type of treatment is known as Highly Active Antiretroviral Therapy-HAART. The first group of drugs are Nucleoside reverse transcriptase inhibitors which delay its transmission. The second group of drugs is Protease inhibitors which block the replication of HIV. Some of the approved drugs are Fusion Inhibitors, Entry Inhibitors, Integrase Inhibitors, Pharmacokinetic Enhancers etc.