Constipation <2 years: Safety and efficacy not established Suspension 2-6 years: 5-15 mL/day of regular-strength liquid PO at bedtime or in divided doses 6-12 years: 15-30 mL/day (400 mg/5 mL) >12 years: 30-60 mL/day (400 mg/5 mL) Acid Indigestion Liquid <12 years: Not recommended >12 years: 5-15 mL (400 mg/5 mL) PO q4hr; no more than 4 doses per 24-hour period