Anaphylactic shock, angioneurotic, laryngeal & peripheral edema, asthma, dermatitis, drug rash, lupus erythematosus-like syndrome, urticaria; bradycardia, cardiac arrest, ECG change including blunting of T-wave & QT interval prolongation, excitability, extrasystoles, HTN, hypotension, palpitation, postural hypotension, reflex tachycardia & bradycardia, tachycardia, precordial pain or discomfort, pallor, severe peripheral & visceral vasoconstriction, severe decreased cardiac output; anxiety, disturbed coordination, dizziness, drowsiness, faintness, sedation, acute labyrinthitis, blurred vision, catatonic-like states, confusion, convulsion, diplopia, disorientation, nightmare, euphoria, excitation, fatigue, hallucination, headache, hysteria, insomnia, lassitude, neuritis, oculogyric crisis, paresthesia, pseudoschizophrenia, restlessness, tinnitus, tongue protrusion, torticollis, tremor, vertigo, weakness, extrapyramidal reactions; epigastric distress, anorexia, constipation, diarrhea, increased appetite, nausea, stomatitis, vomiting, wt gain, stomach pain; metabolic acidosis; pilomotor response, weakness; decreased renal perfusion, reduced urine output; resp distress.