Simethicone allows gas bubbles in the stomach and intestines to come together more easily, which allows for easier passage of gas. Simethicone is used to relieve painful pressure caused by excess gas in the stomach and intestines. Simethicone is for use in babies, children, and adults. Children should never be given more than the recommended dose of simethicone. Call your doctor if the child's gas symptoms do not improve after treatment with simethicone. Simethicone may be only part of a complete program of treatment that also includes a special diet or increased exercise. It is very important to follow the diet and exercise plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you must avoid to help control your condition.