Thrombophlebitis, pain, induration, erythema & tenderness following inj. Rash, urticaria, pruritus, erythema multiforme, Stevens-Johnson syndrome, angioedema, GI disturbances, nausea/vomiting, diarrhea, staining of teeth/tongue, pseudomembranous colitis, hematological disturbances, increase in liver enzymes, taste perversion. Myoclonic activity, seizures, psychic disturbances, confusional states. Hearing loss, taste perversion.