With double the acid fighting power per tablet as TUMS Regular Strength, TUMS Ultra Strength 1000 mg Assorted Berries Chewable Antacid Tablets bring fast and powerful heartburn relief in seconds. TUMS berry antacids neutralize acid on contact and can relieve heartburn, acid indigestion, sour stomach, and upset stomach associated with these symptoms. Made with the gluten-free ingredient calcium carbonate, you can count on these chewable tablets for symptom relief.