Noun
abacavir (uncountable) (abbreviated ABC)
(pharmacology) An antiretroviral drug (trademark Ziagen) taken orally in the form of its sulfate (C14H18N6O)2·H2SO4 in combination with other antiretroviral drugs to treat HIV infections. It is a synthetic nucleoside analog that acts by inhibiting reverse transcriptase. It causes potentially serious hypersensitivity reactions in a small percentage of patients.