ASPIRIN, COUMARIN DERIVATIVES, DIPYRIDAMOLE, DEXTRANS, CEPHALOSPORIN-TYPE ANTIBIOTICS, HIGHLY-DOSED PENICILLIN, NSAIDS, HYDROXYCHLOROQUINE, AND OTHERS THAT INTERFERE WITH PLATELET-AGGREGATION REACTIONS (THE MAIN HEMOSTATIC DEFENSE OF HEPARINIZED
PATIENTS) MAY INDUCE BLEEDING . NITROGLYCERIN INFUSION DIMINISHES ITS EFFICACY. DIGITALIS, TETRACYCLINES, NICOTINE, OR ANTIHISTAMINES MAY PARTIALLY COUNTERACT
THE ANTICOAGULANT ACTION OF HEPARIN SODIUM.