Simethicon, the active ingrediant in mylanta, sold under the brand name little tummies, without the aluminum, will relieve gas. Keep a food diary, to determine which foods are causing the problem. Among the most common are dairy, beans, peas, brocolli, cauliflower, coffee, ibuprofen, as well as many other nsaids for pain. Avoidance of theses foods should bring relief. Beano is a digestive enzyme that is taken with the first bite of food, that is causing the problem, as prevention, for adults. Ginger, and sage are also anti flatulance herbs.
I hope this helps.