Medication Guide App

Magnesium oxide

Pronunciation

Generic Name: magnesium oxide (mag-NEE-zee-um OX-ide)
Brand Name: Examples include Mag-Ox and Uro-Mag

Magnesium oxide is used for:

Treating acid indigestion, heartburn, sour stomach, and low magnesium levels in the body. It also may be used for other conditions as determined by your doctor.

Magnesium oxide is an essential mineral. It works by adding magnesium to your body if your magnesium levels are low. As an antacid, it works by neutralizing stomach acid.

Do NOT use magnesium oxide if:

  • you are allergic to any ingredient in magnesium oxide

Contact your doctor or health care provider right away if any of these apply to you.

Slideshow: 2014 Update - First Time Brand-to-Generic Switches

Before using magnesium oxide:

Some medical conditions may interact with magnesium oxide. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have appendicitis, diarrhea, a blockage of your intestines, heart problems, or kidney problems

Some MEDICINES MAY INTERACT with magnesium oxide. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Anticoagulants (eg, warfarin) because the risk of their side effects may be increased by magnesium oxide
  • Penicillamine because its effectiveness may be decreased by magnesium oxide

This may not be a complete list of all interactions that may occur. Ask your health care provider if magnesium oxide may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use magnesium oxide:

Use magnesium oxide as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take magnesium oxide by mouth with food.
  • If you also take a bisphosphonate (eg, alendronic acid), digoxin, a quinolone (eg, ciprofloxacin), or a tetracycline (eg, doxycycline), do not take them within 2 to 4 hours before or after taking magnesium oxide. Check with your doctor if you have questions.
  • If you miss a dose of magnesium oxide and are using it regularly, take it as soon as possible. If it is almost time for the next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use magnesium oxide.

Important safety information:

  • Do not take more than 2 tablets in a 24-hour period or use for more than 2 weeks without checking with your health care provider.
  • If you are taking magnesium oxide for relief of acid indigestion, heartburn, or sour stomach and your symptoms do not improve within 2 weeks, if they become worse, or if you experience black, tarry stools or vomit that looks like coffee grounds, check with your doctor.
  • Lab tests, including magnesium levels, may be performed while you use magnesium oxide. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Magnesium oxide should not be used in CHILDREN younger than 6 years old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using magnesium oxide while you are pregnant. It is not known if magnesium oxide is found in breast milk. If you are or will be breast-feeding while you use magnesium oxide, check with your doctor. Discuss any possible risks to your baby.

Possible side effects of magnesium oxide:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Diarrhea.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); black, tarry stools; nausea; slow reflexes; vomit that looks like coffee grounds.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include confusion; dizziness; flushing; loss of consciousness; muscle weakness; severe drowsiness; slow heartbeat.

Proper storage of magnesium oxide:

Store magnesium oxide at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep magnesium oxide out of the reach of children and away from pets.

General information:

  • If you have any questions about magnesium oxide, please talk with your doctor, pharmacist, or other health care provider.
  • Magnesium oxide is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take magnesium oxide or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about magnesium oxide. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to magnesium oxide. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using magnesium oxide.

Issue Date: November 5, 2014
Database Edition 14.4.1.002
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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