Extra Strength Heartburn Tablets TUMS Smoothies Chewable Extra Strength Antacid Tablets work in seconds, so you can forget your heartburn and get back to the moments that matter. TUMS extra strength chewable antacid tablets contain 750 mg of calcium carbonate, which is naturally sourced, to quickly and effectively fight heartburn and relieve sour stomach, acid indigestion and upset stomach associated with these symptoms. These smooth tasting and delicious fruit flavored antacid tablets neutralize acid on contact, giving you fast extra strength heartburn relief. Adults and children 12 years and older may chew two to four antacid chewable tablets as symptoms occur or as directed by a doctor. Known as a trusted brand to fight heartburn fast for 90 years, TUMS is America’s #1 antacid and the #1 physician, pharmacist and OBGYN-recommended adult antacid brand. These TUMS antacid tablets come in a resealable bottle that is easy to take on the go in a purse or pocket so you're ready when heartburn strikes.