Dosage: Adults and children over 12 years: Two tablets to be sucked or chewed, as required, preferably 1 hour after meals and before bedtime. For heartburn, an extra 2 tablets may be taken between these times. Suitable for use in pregnancy and breast-feeding. Do not take more than 10 tablets a day. Prolonged use should be avoided. Ingredients Active ingredients: Each tablet contains Calcium carbonate 680 mg and Heavy magnesium carbonate 80 mg.