The interaction between the new quinoline-azaquinoline antibiotic enoxacin and the oral anticoagulant warfarin was investigated in six healthy male volunteers. Enoxacin was found not to affect the hypoprothrombinemic response produced by warfarin but did produce a decrease in the clearance of the less pharmacologically potent enantiomer of warfarin, (R)-warfarin. The decreased clearance of (R)-warfarin produced by concomitant enoxacin administration was found to be a consequence of inhibition by enoxacin of the (R)-6-hydroxywarfarin metabolic pathway.
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Toon et al. (1987) studied this question.