Most people at one time or another may develop heartburn. Not a serious condition unless it becomes persistent. Acid reflux is another medical term for it. It is a condition, that is caused by food backing up into the esophagus. The food is mostly digested but has a high acidic content, that will cause pain and discomfort.
There are several over-the-counter medicines that can temporarily eliminate heartburn, such as Alka-Seltzer, Pepto Bismol, and Zantac to name a few. For severe cases it is recommended that you see your Doctor. Changing your diet and of course exercising will help a great deal. But to find wholesale oral medicines just go online.