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What Is Magnesium Hydroxide?


Answer: Magnesium hydroxide is a chemical compound composed of magnesium, hydrogen, and oxygen. It is a white powder but is often combined with water to form milk of magnesia. Magnesium hydroxide is found to have a variety of medical uses.

More Info: You can use magnesium hydroxide as an effective antiperspirant or topical treatment for canker sores. In its milk of magnesia form, magnesium hydroxide acts as an antacid to relieve heartburn and as a laxative to treat constipation. It is often the first option parents used to treat their child’s constipation, since it is milder and less habit-forming than more potent stimulant laxatives.

Magnesium hydroxide is available for over the counter purchase at your pharmacy, in either chewable tablets or liquid form. It is generally safe, but some people are allergic to magnesium. Seek medical attention if you have an allergic reaction, including swelling, hives, or trouble breathing. Other possible side effects include upset stomach and diarrhea. Medical professionals recommend you take an iron supplement along with milk of magnesia, since it can deplete your body of the iron it needs. If you are pregnant or planning to become pregnant, talk to you doctor before taking magnesium peroxide, since it may have harmful effects on your unborn baby.


Expert Opinion 

Quote: “Magnesium Hydroxide is used for treating acid indigestion, heartburn, sour stomach, and constipation. It may also be used for other conditions as determined by your doctor.  Magnesium Hydroxide is an antacid. It works by neutralizing the acid in the stomach and by stimulating the bowels to move.”

Source: Magnesium Hydroxide



“Magnesium Hydroxide : University of Michigan Health System.” Health Topics A-Z : University of Michigan Health System. N.p., n.d. Web. 24 Aug. 2010.

“Toxicological Risks of Selected Flame-Retardant Chemicals.” The National Academies Press. N.p., n.d. Web. 24 Aug. 2010.

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