abacavir
noun
abac·a·vir
| \ ə-ˈba-kə-ˌvir
\
\
Medical Definition of abacavir
: an antiviral drug taken orally in the form of its sulfate (C14H18N6O)2·H2SO4 in combination with other antiretroviral drugs to treat HIV infection
Note: Abacavir is a synthetic nucleoside analog that acts by inhibiting reverse transcriptase. It causes potentially serious hypersensitivity reactions in a small percentage of patients.