Alka Seltzer Extra Strength Heartburn Relief Chews bring powerful, fast-acting heartburn, acid indigestion, upset stomach and sour stomach relief. These chewable antacid tablets feature a quick release formula that starts neutralizing acid in seconds for rapid multi-symptom relief. Easy to take with you anywhere you go, these fruit flavored calcium carbonate tablets come in non-chalky or gritty strawberry, orange and lemon flavors. Convenient and delicious, these Alka Seltzer Relief Chews help you tackle tough acid indigestion, upset stomach and sour stomach symptoms.