Magnesium is a naturally occurring mineral. Magnesium is important for many systems in the body especially the muscles and nerves. Magnesium hydroxide also reduces stomach acid, and increases water in the intestines which may induce defecation. Magnesium hydroxide is used as a laxative to relieve occasional constipation (irregularity) and as an antacid to relieve indigestion, sour stomach, and heartburn. Magnesium hydroxide may also be used for purposes not listed in this medication guide.
Phillips' Milk of Magnesia is an over-the-counter medication used to treat occasional constipation for adults and children. It is a type of laxative to help relieve patients who may be experiencing fewer than three bowel movements a week, hard stools or straining while having a bowel movement. Phillips' Milk of Magnesia medication is available as an over-the-counter medication.