Adult 1 mg bd on day 1, 2 mg bd on day 2 & 3 mg bd on day 3. Stabilize for 1 wk. Adjust dose further after 1 wk by 1-mg increment bd up to a max of 8 mg/day. Elderly 0.5 mg bd on day 1, increase by 0.5 mg to achieve 1-2 mg bd. Discontinue if tardive dyskinesia occurs.