Viracept is a popular antiretroviral drug used to treat HIV. The generic name of the drug is Nelfinavir. Nelfinavir is a protease inhibitor that works by blocking the functioning of an enzyme that HIV needs to reproduce. There are several synonyms for Viracept, including Nelfinavir mesylate, AG1296, Ro 31-8959, Viraceptum, and MCB-423. These synonyms may be used interchangeably to refer to the same drug. It is essential to know these synonyms in case one is unable to find the original brand name, as the active ingredient remains the same. Nelfinavir is not a cure for HIV, but it can help to slow down the progression of the disease and improve the quality of life of individuals living with HIV.