Antihistamine
- PO (Adults): 6.25–12.5 mg 3 times/day and 25 mg at bedtime.
- PO (Children
2 yr): 0.1 mg/kg/dose (not to exceed 12.5 mg) every 6 hr during the day and 0.5 mg/kg/dose (not to exceed 25 mg) at bedtime. - IM, IV, Rect (Adults): 25 mg; may repeat in 2 hr.
- Rect (Children 2 yr): 0.125 mg/kg every 4–6 hr or 0.5 mg/kg at bedtime.
Antivertigo (Motion Sickness)
- PO (Adults): 25 mg 30–60 min before departure; may be repeated in 8–12 hr.
- PO, Rect (Children 2 yr): 0.5 mg/kg (not to exceed 25 mg) 30–60 min before departure; may be given every 12 hr as needed.
Sedation
- PO, Rect, IM, IV (Adults): 25–50 mg; may repeat every 4–6 hr if needed.
- PO, Rect, IM (Children >2 yr): 0.5–1 mg/kg (not to exceed 50 mg) every 6 hr as needed.
- PO, Rect, IM, IV (Adults): 12.5–25 mg every 4 hr as needed; initial PO dose should be 25 mg.
- PO, Rect, IM, IV (Children 2 yr): 0.25–1 mg/kg (not to exceed 25 mg) every 4–6 hr.