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Magnesium oxideOver the counter
Pronounced mag-NEE-zee-um OX-ide
Brand names: Mag-Ox
Type: Magnesium supplement and antacid · All Other Medicines
What Magnesium oxide is used for
- Magnesium supplementation
- Heartburn (as an antacid ingredient)
- Migraine prevention (clinician-directed)
◆ Kidney note
Magnesium is cleared by the kidneys and can accumulate to dangerous levels in kidney failure — supplements and magnesium antacids or laxatives need clinician approval in kidney disease.
Common side effects
- Diarrhea
- Stomach cramps
- Nausea
Important cautions
- Blocks absorption of some antibiotics and thyroid medicines — timing is separated
How it comes
Tablets, capsules. This guide lists forms only — it never lists strengths or doses.
Related medicines — Other Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.