Does tums (calcium carbonate) relieve gas?

May or may not: Tums (calcium carbonate) is used to treat symptoms caused by too much stomach acid such as heartburn, upset stomach, or indigestion. Calcium carbonate is an antacid that works by lowering the amount of acid in the stomach. For gas symptoms use gas x or simethicone that works by breaking up gas bubbles in the gut. If you have excess gas and gas bloat see your gastroenterologist to rule out small intestinal overgrowt.