magnesium citrate (Citrate of Magnesia, Citroma)

  • 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.

Constipation Myths & Facts

What is magnesium citrate-oral, and 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 brand names are available for magnesium citrate-oral?

Citrate of Magnesia, Citroma

Is magnesium citrate-oral available as a generic drug?


Do I need a prescription for magnesium citrate-oral?


What are the uses for magnesium citrate-oral?

Magnesium citrate is used for bowel evacuation (bowel preparation or cleansing), constipation, and bowel irregularity.

What are the side effects of magnesium citrate-oral?

The most common side effects of magnesium citrate are:

Quick Guide19 Constipation Myths and Facts

19 Constipation Myths and Facts

What is the dosage for magnesium citrate-oral?

  • 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-oral?

Magnesium citrate should not be combined with medications like:

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

Is magnesium citrate-oral 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-oral?

What preparations of magnesium citrate-oral are available?

Liquid: 290 mg/ 5 ml. Tablet: 100 mg

Safe and effective use of magnesium citrate is not established for children under the age of 2.

How should I keep magnesium citrate-oral stored?

Store magnesium citrate between temperatures 8 C and 30 C (46 F and 86 F).

REFERENCE: magnesium citrate.

Last Editorial Review: 7/1/2016

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Reviewed on 7/1/2016
REFERENCE: magnesium citrate.

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