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Generic Name: magnesium oxide (mag NEE see um OCK side)
Brand Name: MagGel, Phillips' Cramp-free, Uro-Mag
Physician reviewed Uro-Mag patient information - includes Uro-Mag description, dosage and directions.
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Drug Information:
Magnesium is a naturally occurring mineral. Magnesium is important for many systems in the body especially the muscles and nerves. Uro-Mag is used as a supplement to maintain adequate magnesium in the body. Uro-Mag is also used as an antacid to treat indigestion, or as a laxative to relieve occasional constipation. Uro-Mag may also be used for purposes not listed in this medication guide. Before you take Uro-Mag, tell your doctor about all your medical conditions or allergies, and all the medicines you are using. Also make sure your doctor knows if you are pregnant or breast-feeding. In some cases, you may not be able to take this medicine, or you may need a dose adjustment or special precautions. Learn more

Uro-mag Side Effects

Uro-Mag Side Effects

Note: This document contains side effect information about magnesium oxide. Some of the dosage forms listed on this page may not apply to the brand name Uro-Mag.

For the Consumer

Applies to magnesium oxide: oral capsule, oral tablet

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 this drug?

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-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

For Healthcare Professionals

Applies to magnesium oxide: compounding powder, oral capsule, oral tablet


Magnesium toxicity symptoms may include: hypotension, nausea, vomiting, facial flushing, urine retention, ileus, depression, lethargy, muscle weakness, respiratory depression, arrhythmia, cardiac arrest, coma, and death.

Frequency not reported: Hypermagnesemia, magnesium toxicity


Frequency not reported: Diarrhea, nausea, abdominal cramping

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com Uro-mag