Increased bleeding tendency w/ anticoagulants (eg, warfarin), antiplatelet drugs (eg, aspirin, ticlopidine HCl, clopidogrel sulfate), thrombolytic drugs (eg, urokinase, alteplase), prostaglandin E
1 or its derivatives (eg, alprostadil, limaprost alfadex). Increased blood conc w/ CYP3A4 inhibitors (eg, macrolide antibiotics, HIV PIs, azole antimycotics, cimetidine, diltiazem HCl, grapefruit juice), CYP2C19 inhibitors (eg, omeprazole).