Increased intensity of bleeding w/ oral anticoagulants, glycoprotein IIb/IIIa inhibitors, ASA, heparin, thrombolytics. May increase risk of GI bleeding w/ NSAIDs including COX-2 inhibitors. CYP2C19 inhibitors eg, omeprazole, esomeprazole, fluvoxamine, fluoxetine, moclobemide, voriconazole, fluconazole, ticlopidine, ciprofloxacin, cimetidine, carbamazepine, oxcarbazepine & chloramphenicol. Reduction of inhibition of platelet aggregation w/ PPIs.