Does Magnesium Oxide Help With Heartburn?

Does Magnesium Oxide Help With Heartburn? Does magnesium oxide help with heartburn? Magnesium oxide may be used for different reasons. Some people use it as an antacid to relieve heartburn, sour stomach, or acid indigestion. Magnesium oxide also may be used as a laxative for short-term, rapid emptying of the bowel (before surgery, for example).