Hypersensitivity reactions
Adult: As hydrochloride: 25-50 mg every 4-6 hr. Max: 600mg daily.
Child: As hydrochloride: 5 mg/kg in 4-6 divided doses daily. Max: 300mg daily.
Child: As hydrochloride: 5 mg/kg in 4-6 divided doses daily. Max: 300mg daily.