Discontinue use if extrapyramidal symptoms, NMS, tardive dyskinesia, methemoglobinemia occur. Patients w/ underlying neurological disorders, cardiac conduction disorders, electrolyte imbalance, bradycardia. Parkinson's disease. High dose & long-term treatment. Concomitant use w/ other centrally-acting drugs, drugs prolonging QT interval. ESRD (CrCl ≤15 mL/min), moderate to severe renal impairment (CrCl 15-60 mL/min). Severe hepatic impairment. Pregnancy & lactation. Elderly. Tab: Not suitable for childn <30 kg.