Tums

Tums (stylized as TUMS) is a brand of antacid made of sucrose (table sugar) and calcium carbonate (CaCO₃) manufactured by Haleon in St. Louis, Missouri, US. They are also available in a sugar-free version. It is an over-the-counter drug, available at many retail stores, including drug stores, grocery stores and mass merchandisers. It provides relief from heartburn and indigestion ("sour stomach").