Aspirin: Potentiates the effect of aspirin on collagen-induced platelet aggregation.
NSAID: Risk of increased occult gastrointestinal blood loss.
Phenytoin, Tamoxifen, Tolbutamide, Warfarin, Torsemide, Fluvastatin: Since Clopidogrel inhibits CYP4502C9, it may interfere with the metabolism of these drugs.