Increased risk of renal or hearing impairment w/ ethacrynic acid, aminoglycosides, bacitracin, polymixin B or colistin, viomycin, amphotericin B, cisplatin or neuromuscular blockers. Increased frequency of anaphylactoid reaction w/ anesth agents. May increase adverse reactions w/ potentially neurotoxic drugs eg, amphotericin B, aminoglycosides, bacitracin, polymyxin B, colistin, viomycin & platinum antitumor drugs (cisplatin, nedaplatin). Increased anticoagulant activity w/ anticoagulant.