INR) may be ordered to assess the degree of
blood-thinning when warfarin and
clopidogrel are used together. The same enzyme also is responsible for the metabolism of phenytoin (Dilantin), tamoxifen (Nolvadex), tolbutamide (Orinase), torsemide (Demadex), and fluvastatin (Lescol). Although important interactions between clopidogrel and these drugs are unlikely, interactions should be looked for carefully.