Magnesium Hydroxide (patient information)
Why this medication is prescribed
Magnesium hydroxide is used on a short-term basis to treat constipation.
This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
How this medication should be used
Magnesium hydroxide come as a tablet and liquid to take by mouth. It usually is taken as needed for constipation. Follow the directions on the package or on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take magnesium hydroxide exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Shake the liquid well before each use.
Special precautions
Before taking magnesium hydroxide:
- tell your doctor and pharmacist if you are allergic to magnesium hydroxide or any other drugs.
- tell your doctor and pharmacist what prescription and nonprescription medications you are taking, including vitamins.
- tell your doctor if you have or have ever had kidney disease.
- tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking magnesium hydroxide, call your doctor.
What to do if you forget a dose
This medication usually is taken as needed. If your doctor has told you to take magnesium hydroxide regularly, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
Side effects
Magnesium hydroxide may cause side effects. If you experience any of the following symptoms, call your doctor immediately:
- stomach cramps
- upset stomach
- vomiting
- diarrhea
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/MedWatch/report.htm] or by phone [1-800-332-1088].
Storage conditions needed for this medication
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
Other information
Ask your pharmacist any questions you have about taking this medicine.
Brand names
- Milk of Magnesia®
- Milk of Magnesia-Concentrated®
- Phillips Milk of Magnesia®