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Hypomagnesemia means low levels of magnesium in the blood.

Alternative Names:

Low blood magnesium; Magnesium - low

Causes, incidence, and risk factors:

Several conditions can cause hypomagnesemia, including:

  • Alcoholism
  • Chronic diarrhea
  • High blood calcium levels
  • Hyperaldosteronism
  • Malabsorption
  • Malnutrition
  • Use of certain medications including amphotericin, cisplatin, and diuretics
  • Excessive urination (polyuria)


Signs and tests:


Support Groups:

Expectations (prognosis):


Calling your health care provider:



Yu ASL. Disorders of magnesium and phosphorous. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 120.

Review Date: 8/3/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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