magnesium citrate

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

What is magnesium citrate? How does it work (mechanism of action)?

Magnesium citrate is supplied as an oral tablet or liquid saline laxative. Magnesium citrate retains water in the intestines by osmosis. Increasing water in the bowel aids motility, usually producing a bowel movement within one-half to six hours.

What are the uses for magnesium citrate?

Magnesium citrate is used for:

What are the side effects of magnesium citrate?

The most common side effects of magnesium citrate are:

What is the dosage for constipation? How should it be taken?

  • Adults and children 12 years of age and older: Use 195 to 300 ml of magnesium citrate with a full glass of water. It may be taken as a single dose or divided doses or may also be used with 2 to 4 tablets at bedtime.
  • Children 6 to under 12 years of age: Use 90 to 210 ml of magnesium citrate with a full glass of water; it may be taken as a single dose or divided doses.
  • Children 2 to under 6 years of age: Use 60 to 90 ml of magnesium citrate; it may be taken as a single dose or divided doses with a maximum dose of 90 ml in 24 hours.

Which drugs or supplements interact with magnesium citrate?

Magnesium citrate should not be combined with antibiotics like:

Magnesium citrate decreases absorption of these antibiotics and leads to decreased therapeutic effect.

Is magnesium citrate safe to take if I'm pregnant or breastfeeding?

  • There is little risk of harm to the developing fetus.
  • Magnesium citrate can be safely and effectively used in nursing mothers because of minimal infant risk.

What else should I know about magnesium citrate?

  • Magnesium citrate is availabe as 290 mg/ 5 ml and tablets of 100 mg.
  • Store magnesium citrate between temperatures 8 C and 30 C (46 F and 86 F).
  • Magnesium citrate is availabe in generic form.
  • You do not need a prescription from your doctor to buy Milk of Magnesia.

Quick GuideDigestive Disorders: 23 Constipation Myths and Facts

Digestive Disorders: 23 Constipation Myths and Facts

Summary

Magnesium citrate (Citrate of Magnesia, Citroma) is an OTC medicine that retains water in the intestines to relieve constipation. A magnesium citrate supplement is used for treating heartburn. Side effects include abdominal cramps, diarrhea, bloating, and an electrolyte imbalance. Dosage depends whether it is an adult or child being treated. Magnesium citrate interacts with some antibiotics.

Magnesium citrate (Citrate of Magnesia, Citroma) is an over-the-counter medicine that helps relieve and treat constipation. Magnesium citrate supplements also are used for treating heartburn.

Side effects of magnesium citrate include nausea, vomiting, abdominal cramps, diarrhea, bloating, and an electrolyte imbalance.

Dosage of magnesium citrate depends on a person’s age. Magnesium citrate should not be combined with some antibiotics, for example, doxycycline (Vibramycin), tetracycline, minocycline (Minocin), ciprofloxacin (Cipro), and levofloxacin (Levaquin).

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Medically Reviewed on 6/25/2018
References
REFERENCE: NIH.gov. magnesium citrate.
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