This is an old revision of this page, as edited by Susan Mason (talk | contribs) at 07:42, 12 March 2003. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 07:42, 12 March 2003 by Susan Mason (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)Zidovudine (AZT) was the first antiviral drug to be approved for treating HIV. It was originally developed to treat cancer, but was also found to block the action of the "reverse transcriptase" enzyme that HIV uses to replicate its RNA for splicing into the DNA of a target cell.