Magnesium Oxide 400

Generic name: Magnesium Oxide [ mag-NEE-zhum-OKS-ide ]
Brand names: Mag-200, Mag-Oxide, Magnesium Oxide 400, MAGnesium-Oxide, Maox, Uro-Mag
Drug class: Minerals and electrolytes

Medically reviewed by Drugs.com. Last updated on Nov 16, 2023.

Uses of Magnesium Oxide 400:

It is used to treat or prevent low magnesium levels.
It is used to treat heartburn and upset stomach.
It may be given to you for other reasons. Talk with the doctor.

What do I need to tell my doctor BEFORE I take Magnesium Oxide 400?

If you have an allergy to magnesium or any other part of Magnesium Oxide 400 (magnesium oxide).
If you are allergic to Magnesium Oxide 400 (magnesium oxide); any part of Magnesium Oxide 400 (magnesium oxide); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Magnesium Oxide 400 (magnesium oxide) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Magnesium Oxide 400?

Tell all of your health care providers that you take Magnesium Oxide 400 (magnesium oxide). This includes your doctors, nurses, pharmacists, and dentists.
Do not take Magnesium Oxide 400 (magnesium oxide) for more than 2 weeks unless told to do so by your doctor.
Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Magnesium Oxide 400 (magnesium oxide) while you are pregnant.
Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is this medicine (Magnesium Oxide 400) best taken?

Use Magnesium Oxide 400 (magnesium oxide) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

Follow how to take Magnesium Oxide 400 (magnesium oxide) as you have been told by your doctor. Do not use more than you were told to use.
Take Magnesium Oxide 400 (magnesium oxide) with food.
Take with a full glass of water.

What do I do if I miss a dose?

Take a missed dose as soon as you think about it.
If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
Do not take 2 doses at the same time or extra doses.

omeprazole, famotidine, pantoprazole, esomeprazole, sucralfate, MiraLAX, Protonix, bisacodyl, docusate, lactulose

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
Severe diarrhea.

What are some other side effects of Magnesium Oxide 400?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

Diarrhea.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Magnesium Oxide 400?

Store at room temperature.
Store in a dry place. Do not store in a bathroom.
Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

Consumer Information Use and Disclaimer

If your symptoms or health problems do not get better or if they become worse, call your doctor.
Do not share your drugs with others and do not take anyone else's drugs.
Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Magnesium Oxide 400 (magnesium oxide), please talk with your doctor, nurse, pharmacist, or other health care provider.
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.