TUMS Chewy Bites Chewable Antacid Tablets go to work in seconds to make heartburn relief simple and delicious. When symptoms occur, take two to four chewable antacids, depending on the severity of your acid indigestion. Featuring the active ingredient calcium carbonate, they relieve heartburn, sour stomach, acid indigestion and provide upset stomach relief associated with these symptoms. Each chewable, gluten-free tablet delivers fast relief in every bite. They come in three delicious, assorted berry flavors. The active ingredient in these tablets can be found in nature. Extra-strength tablets come in a compact, recyclable bottle that's easy to stow for whenever heartburn strikes. With TUMS Chewy Bites, you get a tasty way to fast heartburn relief in every chewy bite.