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Magnesium Hydroxide

Medically reviewed by Last updated on Dec 21, 2023.

Excipient (pharmacologically inactive substance)

What is it?

Magnesium is a naturally occurring mineral, and is essential for the diet. It is important for many systems in the body, especially the muscles and nerves. Magnesium is present in fruits, vegetables, grains, milk, meat and fish and the natural content of these foods is the major source of the current dietary intake. Magnesium hydroxide is used as a laxative to relieve occasional constipation (irregularity) and as an antacid to relieve indigestion, sour stomach, and heartburn. Commonly known as 'Milk of Magnesia'. Magnesium hydroxide (Mg[OH]2) is used in the pharmaceutical industry as a tablet and capsule diluent.[1]

List of medications using Magnesium Hydroxide


  1. Magnesium hydroxide. Accessed February 21, 2015 at
  2. [2]Dave RH. Overview of pharmaceutical excipients used in tablets and capsules. Drug Topics (online). Advanstar. 10/24/2008 Accessed 08/19/2011

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.