Allergic conditions
Adult: As HCl: 12-24 mg/day in divided doses. Max dose: 36 mg/day.
Child: As HCl: 4-6 mg/day in divided doses.
Child: As HCl: 4-6 mg/day in divided doses.
Topical/Cutaneous
Pruritic skin disorders
Adult: As HCl: Apply a thin layer on the affected area once daily or as needed.