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Magnesium Oxide & Constipation

Constipation is a common condition of the bowel that causes significant discomfort. Left untreated, constipation can lead to more serious medical conditions, such as impaction. Magnesium is a mineral that your body needs. In the form of magnesium oxide, it is one of many treatments for constipation.

  1. Effect of Magnesium Oxide on Constipation

    • Magnesium oxide may be used to relieve acute constipation, but it should not be used routinely as a laxative. After taking magnesium oxide, you can expect a rapid emptying of your bowels.

    How to Take Magnesium Oxide as a Laxative

    • A recipe for using magnesium oxide as a laxative is suggested by Life Extension: Mix 4 to 8 grams of vitamin C powder, the juice of a freshly squeezed grapefruit, and 1500 mg of magnesium oxide. Drink the mixture on an empty stomach to bring on colon peristalsis, the action of the bowel that causes it to empty. Magnesium oxide is also available as a tablet or capsule.

    Interactions with Other Medications

    • The National Institutes of Health's MedLine Plus recommends taking magnesium oxide to treat constipation at least two hours before or after taking other prescription or nonprescription medications to keep it from interfering with their effectiveness.

    Brand Names

    • Magnesium oxide is sold under the brand names Mag-200, Mag-Ox 400, MagGel, Uro-Mag, Phillips' Cramp-free, among others.

    Side Effects

    • Using magnesium oxide to relieve constipation can cause diarrhea and cramping. MedLine Plus lists these side effects as needing immediate medical attention: itching, hives, rash, mood changes, weakness, tiredness, nausea, vomiting and numbness.

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