Dipyridamole interacts with heparin antiinflammatories/analgesics nonsteroidal, anticoagulants - coumarin or indandione-derivative, azlocillin, carbenicillin, cefamandole, cefoperazone, dextrans, mezlocillin, piperacillin, salicylates, sulfinpyrazone, valproic acid, streptokinase and urokinase.