TUMS Extra Strength 750 Assorted Fruit Antacids 3 Pack 8 Count for Powerful Heartburn Relief TUMS Extra Strength 750 Assorted Fruit Antacids relieve your heartburn in seconds so you can fight heartburn fast. The active ingredient in TUMS Extra Strength naturally sourced calcium carbonate neutralizes stomach acid at the source to provide fast and powerful heartburn relief. These tasty fruity antacids treat heartburn sour stomach acid indigestion and an upset stomach associated with these symptoms. TUMS Chewable Tablets are America?s #1 antacid and the #1 doctor pharmacist and OBGYN recommended chewable antacid brand. TUMS have been providing trusted heartburn relief since 1930 and our products are fully backed by our satisfaction guarantee. TUMS Extra Strength Fruity Antacids come in a convenient resealable bottle that you can take on-the-go to fight heartburn anytime it strikes.