Reversible deafness; hypotension, palpitations, substernal pressure, phlebitis; inj site reactions, generalised flushing, erythematous macular rash, bullous eruption disorders; overgrowth of nonsusceptible organisms; reversible neutropenia, eosinophilia; histamine release w/ chills, nausea, urticaria, fever & rigors, hypersensitivity reactions; pain, chest & back muscle spasms.