Magnesium oxide is used as an antacid that cures heartburn, acid indigestion and sour stomach. In some applications, this is used as a laxative that allows for the rapid emptying of the bowel. Repeated use of the chemical is prohibited. This is used to make the medicines that deals with the low levels of magnesium. It can be dissolved in Acid and Ammonia. Known as an osmotic laxative, this is available at cost-effective rates.