Definition of "abacavir"

(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.