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(CC) Image: David E. Volk
Abacavir, an antiviral drug, is a nucleotide analog.
IUPAC name: see chemistry section
Synonyms: ABC
Formula: C14H18N6O

 Uses: HIV

 Properties: reverse transcriptase inhibitor

 Hazards: see drug interactions

Mass (g/mol): CAS #:
286.3323 136470-78-5

Abacavir, abbreviated ABC, is a nucleoside analog reverse transcriptase inhibitor (NRTI) used to treat HIV/AIDS. It becomes phosphorylated by cellular enzymes into an active metabolite, caravir triphosphate, which is an analog of deoxyguanosine-5'-triphosphate (dGTP). Caravir triphosphate gets incorporated into viral DNA where it acts as a chain terminator because it does not contain a 3'-hydroxy group needed to link with the next DNA base. It also inhibits HIV-1 transcriptase by binding to the enzyme so that the natural base, dGTP, cannot bind. Because the drugs' metabolism involves the enzyme alcohol dehydrogenase, use of alcohol with this drug should be avoided.


The IUPAC chemical name of abacavir is [(1R)-4-[2-amino-6-(cyclopropylamino)purin-9-yl]-1-cyclopent-2-enyl]methanol, and is has chemical formula C14H18N6O, giving it a molecular mass of 286.3323 g/mol. It is a purine analog.

External Links

The most up-to-date information about Abacavir and other drugs can be found at the following sites.