Avoid concurrent &/or sequential use w/ other drugs w/ similar toxic potential (eg, other aminoglycosides, acyclovir, amphotericin B, bacitracin, capreomycin, cephalosporins, colistin, cisplatin, methoxyflurane, polymyxin B, vancomycin). Increased risk of ototoxicity w/ ethacrynic acid, furosemide, urea, mannitol. May potentiate neuromuscular blockade & cause resp paralysis w/ general anesth of neuromuscular blocking agents (eg, succinylcholine, tubocurarine). May potentiate effects of oral anticoagulants w/ oral neomycin. Additive or synergistic effect w/ β-lactam antibiotics or vancomycin & extended-spectrum penicillins.