Ingredient

Magnesium Oxide

Magnesium oxide is a pharmaceutical ingredient used for magnesium supplementation and neutralizing gastric acid.

See medicines used for Digestion / Gastritis / Heartburn
All medicines
523
Single ingredient
7
Combination
516
Prescription medication
2
OTC medication
521

MFDS ingredient code M040262

What does it do?

Magnesium oxide is an inorganic agent used to supplement magnesium, commonly included in vitamin preparations and antipyretic, analgesic, and anti-inflammatory drugs. This ingredient is used to improve magnesium deficiency or to neutralize gastric acid.

Magnesium oxide breaks down into magnesium ions in the body, assisting with nerve and muscle function, and neutralizes acid in the stomach, alleviating discomfort caused by excessive stomach acid. This helps to supplement magnesium deficiency and regulate the gastrointestinal environment.

Commonly used for

Approved uses differ by product. Check each product's information for its actual use.

Good to know

Magnesium oxide exhibits superior gastric acid neutralization effects compared to other magnesium preparations and is used as a combination agent with vitamins to support both nutritional supplementation and gastric protection. Additionally, it has a relatively mild effect on the digestive system.

Medicines containing this ingredient

Even with the same ingredient, strength, dosage form and how it is taken can differ.

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Dosage form
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523 total

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Even with the same ingredient, dosage and approved uses can differ by strength, dosage form and combined ingredients. Check each product's information before taking it.

Combined ingredients

Ingredients used together with this ingredient in combination products.

Questions about this ingredient

  • QI was told it is good for constipation. Can it be taken every day?

    Magnesium hydroxide draws water into the intestines, softening stools, and is also used as a laxative. However, those with impaired kidney function may accumulate magnesium in their bodies, so it is advisable to consult with a doctor or pharmacist before taking it daily for a long period.

    Answers 1 · 2026.09.14

For anything that needs medical judgment, consult a doctor or pharmacist.

SourceKorea Ministry of Food and Drug Safety (Drug Safety Korea)

This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.