From the manufacturer's website:
Alka Seltzer Heartburn Relief and Gas Relief Chews deliver fast and powerful heartburn, gas and bloating relief. These heartburn and gas chews contain calcium carbonate that starts neutralizing stomach acid in seconds, with simethicone that reduces bloating and pressure. These antigas and antacid tablets bring you fast acting and effective occasional heartburn, acid indigestion and sour stomach relief while alleviating that stuffed feeling commonly referred to as gas. Offering a delicious tropical punch flavor without the chalky or gritty taste, these antacid and antigas Alka Seltzer Relief Chews provide chewable heartburn relief that's easy to take with you everywhere.
Warning: See attached picture.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.