Product Description For Gastric & HeartBurn. Magnesium trisilicate relieves the pain and discomfort of indigestion and heartburn. Dosage: The recommended adult dose dose is 10-20 ml three times daily between meals, and at bedtime. If you are taking other medicines, do not take magnesium trisilicate within two hours (before or after) of your other medicines. *** SHAKE WELL BEFORE USE *** Store below 30°C. Protect from freezing. Keep out of reach of children