Magnesium oxide

Generic name: magnesium oxide [ mag-NEE-see-um-OCK-side ]
Brand names: MagGel, Phillips' Cramp-free, Uro-Mag, Mag-200, Mag-Ox 400, UroMag
Dosage forms: oral capsule (140 mg; 600 mg); oral tablet (250 mg; 400 mg; 420 mg; 500 mg; base 500 mg)
Drug class:Minerals and electrolytes

Medically reviewed by Drugs.com on Apr 18, 2022. Written by Cerner Multum.

What is magnesium oxide?

Magnesium is a naturally occurring mineral. Magnesium is important for many systems in the body especially the muscles and nerves.

Magnesium oxide is used as a supplement to maintain adequate magnesium in the body.

Magnesium oxide is also used as an antacid to treat indigestion, or as a laxative to relieve occasional constipation.

Magnesium oxide may also be used for purposes not listed in this medication guide.

Warnings

Before you take magnesium oxide, tell your doctor about all your medical conditions or allergies, and all the medicines you are using. Also make sure your doctor knows if you are pregnant or breast-feeding. In some cases, you may not be able to take magnesium oxide, or you may need a dose adjustment or special precautions.

Before taking this medicine

You should not use magnesium oxide if you are allergic to it.

Ask a doctor or pharmacist if it is safe for you to use magnesium oxide if you have other medical conditions, especially:

• kidney disease;

• heart disease;

• nausea, vomiting;

• a blockage in your inte...