Childn >45 kg Initially 0.1 mg at bed time may be increased every 3-7 days by 0.1 mg increments bid, then tid, then qid. Max dose: 0.4 mg/day,
≤45 kg Initially 0.05 mg at bed time may be increased every 3-7 days by 0.05 mg increments bid, then tid, then qid. Max dose: 0.2 mg/day for patients weighing 40.5-45 kg. When discontinuing therapy, taper gradually over 1-2 wk.