Increased intensity of bleeding w/ oral anticoagulants. Caution when in concomitant w/ aspirin, heparin, thrombolytics, glycoprotein IIb/IIIa inhibitors, NSAIDs including COX-2 inhibitors. Use of CYP2C19 inhibitors (eg, omeprazole & esomeprazole, fluvoxamine, fluoxetine, moclobemide, voriconazole, fluconazole, ticlopidine, ciprofloxacin, cimetidine, carbamazepine, oxcarbazepine & chloramphenicol) is discouraged. Decrease exposure of active metabolite of clopidogrel w/ proton pump inhibitors (eg, omeprazole, esomeprazole).