Support: MANAGEMENT OF MILD TO MODERATE TOXICITY: Supportive care is the mainstay of treatment. Administer naloxone for CNS or respiratory depression. MANAGEMENT OF SEVERE TOXICITY: Supportive care is the mainstay of treatment. Administer oxygen and monitor for respiratory and CNS depression. Administer naloxone to reverse respiratory or significant CNS depression. Treat dystonic reactions with benztropine (1 to 4 mg IV or orally, maximum 6 mg/day) or diphenhydramine. Assisted ventilation may be needed. Cardiac dysrhythmias (eg, prolonged QRS and QT intervals, monomorphic and polymorphic (torsades de pointes [TdP]) ventricular dysrhythmias) developed in 5 patients with a history of loperamide abuse (doses: 70 mg to 792 mg daily). Treatment with standard anti-arrhythmic agents were ineffective; however, electrical overdrive pacing or isoproterenol continuous infusion were effective in treating dysrhythmias and preventing further episodes of TdP.