Medication info
Pharmgen Magnesium Oxide Tablet

Pharmgen Magnesium Oxide Tablet

OTC medicationTablet경구
Ingredient · strength
Magnesium Oxide›250mg / 1 tablet
Manufacturer / importer
(주)팜젠사이언스
Appearance
White round tablet
Packaging
1000 tablets/bottle
Approval status
Active

MFDS item code 201804159 · Notified 2018.10.22 · Insurance code 670104300

Summary

Main use
Improvement of symptoms related to the stomach (ulcer, gastritis) and excess stomach acid, as well as relief of constipation.
Who takes it
Adults
Adult dose
For gastric and duodenal ulcers, gastritis, and excess stomach acid, magnesium oxide is administered orally in divided doses of 0.5-1g per day. For constipation, 2g is administered orally in 1-2 divided doses per day. Initially, take the minimum dosage and adjust upwards or downwards based on the condition of bowel movements.

Ingredients

Manufacturer
(주)팜젠사이언스

Efficacy & effects

Improvement of symptoms related to the stomach (ulcer, gastritis) and excess stomach acid, as well as relief of constipation.

  • Gastric and duodenal ulcers
  • gastritis
  • excess stomach acid
  • constipation
View approved original text

This medication acts as an antacid to relieve symptoms caused by gastric and duodenal ulcers, gastritis, and excess stomach acid, and also helps improve constipation. Therefore, it is used effectively for treating gastrointestinal disorders and constipation.

How to take

Adult dose

For gastric and duodenal ulcers, gastritis, and excess stomach acid, magnesium oxide is administered orally in divided doses of 0.5-1g per day. For constipation, 2g is administered orally in 1-2 divided doses per day. Initially, take the minimum dosage and adjust upwards or downwards based on the condition of bowel movements.

Precautions

This medication should not be used in patients with severely impaired kidney function, as excessive magnesium buildup in the body can be dangerous. Additionally, it is advisable not to administer this medication to patients with diarrhea, as diarrhea can affect the efficacy or side effects of the drug. Patients with weak heart function, high magnesium levels, and those aged over 65 should use this medication with caution, as they have a higher risk of side effects. Taking this medication may occasionally cause gastrointestinal issues such as diarrhea. If a large quantity is taken for a long time, blood magnesium levels may increase, so careful monitoring is required, and if abnormalities are found, dosage reduction or temporary cessation of the drug may be necessary. If symptoms such as dizziness, slowed heartbeat, severe drowsiness, clouded consciousness, shortness of breath, or muscle weakness occur after taking the medication, use should be stopped immediately, and a doctor or pharmacist should be consulted. It is advisable to bring the medication leaflet during consultation. If signs of magnesium toxicity occur, potassium salt injections may be needed, so follow medical advice. This medication may interfere with the absorption of certain antibiotics, specifically tetracycline antibiotics, so it is recommended not to take them together. Additionally, this medication may alter the gastrointestinal environment, affecting the absorption or excretion of other medications, so caution is advised when taken together. If taken excessively with large amounts of milk or calcium preparations, a condition known as milk-alkali syndrome may develop. This syndrome is characterized by elevated levels of calcium and nitrogen in the blood and a shift toward alkalinity in the body; if these symptoms arise, the medication should be discontinued.

Side effects and when to seek care immediately

Serious side effects

Shortness of breath

Mild side effects

  • Diarrhea
  • dizziness
  • slowed heartbeat
  • strong drowsiness
  • clouded cognition
  • muscle weakness
  • dry mouth
  • vomiting

Not everyone experiences these, and they can vary from person to person.

Interactions

Drug interactions

This medication should not be taken together with tetracycline antibiotics.

Food interactions

This medication should be discussed with a doctor or pharmacist if taken with large amounts of milk and calcium preparations.

Storage

This medication should be stored in an airtight container to prevent air from entering and kept at room temperature between 1 and 30 degrees Celsius. Storing it this way helps maintain the medication's effectiveness for a longer time.

Appearance and packaging

Appearance

White round tablet

Package unit

1000 tablets/bottle

Same-ingredient medicines

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

Even with the same ingredient, the dose and directions can differ by strength and dosage form. Talk to a doctor or pharmacist before switching from a medication you are already taking.

Questions about this medicine

  • QI tend to drink a lot of milk; is that okay?

    Consult with your doctor or pharmacist when taking large amounts of milk or calcium preparations. It is also recommended not to take with tetracycline class antibiotics.

    Answers 1 · 2026.09.14

  • QHow should I take it for constipation?

    For adults with constipation, it is directed to take 2g once or twice daily. Start with the minimum amount and adjust slightly while monitoring the shape and condition of the stool.

    Answers 1 · 2026.09.14

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

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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.