AZT is the abbreviation for 3´-azido-2´,3´-dideoxythymidine, a nucleoside analog frequently used to treat retrovirii such as HIV. It goes by the common name zidovudine, and is also marketed as Retrovir. Blocks the action of reverse transcriptase because it mimics the structure of its normal substrate. Reverse transcriptase binds it very strongly, but cannot shed it easily, effectively blocking the enzyme's active site and preventing the reverse transcription of the viral genome.

Common side effects:
bone marrow damage, myopathy(muscle pain).

See also: Protease Inhibitor