75 mg/day in divided doses. May gradually increase to 150 mg/day preferably in late afternoons or bedtimes. Alternatively, initiate therapy w/ 50-100 mg at bedtime. Increase by 25-50 mg as necessary to a total of 150 mg daily. Hospitalized patients
Initially 100 mg/day, gradually increase to 200-300 mg/day, if necessary. Adolescent & elderly patients
10 mg tid w/ 20 mg at bedtime. Maintenance: 40-100 mg daily. Total daily dose may be given in single dose at bedtime.