TUMS Ultra Strength Chewable Antacid Tablets go to work in seconds by starting to neutralize acid on contact to bring fast and powerful ultra strength heartburn relief. When symptoms occur, chew and swallow two to three ultra strength tablets, depending on the severity of your acid indigestion. Featuring the active ingredient calcium carbonate, these chewable antacids relieve heartburn, sour stomach and acid indigestion and provide upset stomach relief associated with these symptoms. TUMS antacid tablets are the #1 recommended adult antacid brand by doctors, pharmacists and OBGYNs. As America's #1 antacid and trusted as a heartburn medicine for 90 years, TUMS is fully supported with a satisfaction guarantee. These 1000 mg antacid tablets are gluten free and kosher. Packaged in a resealable bottle, this heartburn and acid indigestion medicine is convenient to keep in your car or office for whenever heartburn strikes. Choose TUMS Ultra Strength to fight flare ups fast, at home or on the go.