Potential additive effect w/ drug associated w/ bleeding risk. Concomitant administration w/ oral anticoagulants may increase intensity of bleedings. Caution in patients who receive concomitant glycoprotein IIb/IIIa inhibitors. Possible increased risk of bleeding w/ heparin. Increased occult GI blood loss w/ naproxen; caution when co-administered w/ NSAIDs including Cox-2 inhibitors. Platelet activation may be affected & risk of bleeding is increased by w/ SSRIs. Reduced drug levels of clopidogrel's active metabolite w/ strong or moderate CYP2C19 inhibitors eg, omeprazole & esomeprazole, fluvoxamine, fluoxetine, moclobemide, voriconazole, fluconazole, ticlopidine, ciprofloxacin, cimetidine, carbamazepine, oxcarbazepine & chloramphenicol. Increased repaglinide exposure.