Children (6 years and over) and adults: 10 mg once a day.
Children 2-5 years, hay fever: 5 mg daily or 2.5 mg twice daily.
Or as prescribed by a physician.
In patients with renal impairment, it is recommended that the dosage be reduced to half the usual daily dose.
Missed dose: Take the missed dose as soon as the patient remembers then the subsequent dose as recommended, i.e., after 24 hours (if once daily) or after 12 hours (if twice daily).