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Magnesium Oxide

Medically reviewed by Last updated on Feb 27, 2023.

Excipient (pharmacologically inactive substance)

What is it?

Magnesium is a naturally occurring mineral, and is essential for the diet. It is an odorless, white powder. 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 oxide (MgO) is used as a supplement to maintain adequate magnesium in the body. Magnesium oxide is also used in the pharmaceutical industry as a tablet and capsule diluent.[1]

List of medications using Magnesium Oxide


  1. Magnesium oxide. 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.