Magnesium oxide, or magnesia, is a white solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO. It is formed by an ionic bond between one magnesium and one oxygen atom. Magnesium oxide is hygroscopic in nature and care must be taken to protect it from moisture. Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to separate moisture.

In medicine, magnesium oxide is used for relief for heartburn and sore stomach, as an antacid, magnesium supplement, and as a short-term laxative. It is also used to improve symptoms of indigestion. Side effects of magnesium oxide may include nausea and cramping.3 In quantities sufficient to obtain a laxative effect, side effects of long-term use include enteroliths resulting in bowel obstruction.


Mag-oxide Discussions

  1. link Vmitchell
    How am I suppose to feel?
    I was told to take 400mg 3x a day for constipation, along with Amitiza twice a day. I am fatigue, and sick to my stomach, but no vomiting. I ache as i - 55% more...
    Vmitchell- over a year ago - in Mag-Oxide
  2. link Vmitchell
    Mag-Oxide ox
    I have just recently been put on Mag-Ox 400mg for constipation, 3 x a day. I am also taking Amitiza, 2 x a day. I have had two movements but feel I sh - 11% more...
    Vmitchell- over a year ago - in Mag-Oxide
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