Atrizin tablet: Adults and children over 12 years : 10 mg (1 tablet) once daily.
Atrizin syrup: Adult & Children over 6 yrs : 10 mg (2 teaspoonful) daily.
Child 2-6 yrs: 5 mg (1 teaspoonful) daily or 2.5 mg (1/2 teaspoonful) twice daily.
Cetirizine is safe for use in the elderly patients.
Less frequent dosing is advised in patients with reduced creatinine clearance. In patients with renal insufficiency, dosage should be reduced to half the daily dose.