(soo‵pĕr-wor'fă-rĭn )

Any of a group of anticoagulant drugs derived from warfarin, used principally for their toxic effect on vermin. Agents in this class have a long half life (weeks to months) compared with warfarin (half life about 1.5 days). They inhibit the synthesis of vitamin K-dependent clotting factors. The principal toxic effect is bleeding. Brodifacoum is a commonly used superwarfarin in the U.S.