Depression
Children: 1–1.5 mg/kg/24 hr divided tid.
Adolescents: 30–100 mg at bedtime or divided bid (max: 200 mg/24hr).
Adults: 30–100 mg q 24 hr (max: 300 mg/24 hr).

Analgesic for neuropathic or chronic pain or migraine prophylaxis
Children: 0.1 mg/kg at bedtime and advance over 2–3 wk to effect (max: 2 mg/kg at bedtime).
Adolescents: 25 mg divided bid and increase dose to effect (max: 200 mg/24 hr).
Adults: 25 mg at bedtime and increase dose to effect (max: 300 mg/24 hr).