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Comparing 4 Antacids: Pepto Bismol, Antacid Liquid, Zantac, and Tums Backround: A heartburn is a burning feeling in the middle of your chest caused by acid leaking upwards from the stomach into the esophagus, or swallowing tube. Doctors call this reflux esophagitis. Normally, the muscular esophagus acts like a one-way valve allowing food to enter your stomach after swallowing, but not letting anything go back up. When your esophagus is too loose where it connects to the stomach, strong stomach acid seeps back through the opening and causes heartburn. Because your esophagus doesn't have a protective lining like the stomach, it can be burned by the acid causing pain and sometimes damage. Heartburn can also cause night time cough, wheezing, and in some cases difficulty swallowing food due to scarring of the esophagus. To get rid of a heartburn, in the United States, almost 50% of the population has heartburn at...

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