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Magnesium deficiency

Definition

Magnesium deficiency is a condition in which the amount of magnesium in the blood is lower than normal. The medical name of this condition is hypomagnesemia.

Causes

Every organ in the body, especially the heart, muscles, and kidneys, needs the mineral magnesium. It also contributes to the makeup of teeth and bones. Magnesium is needed for many functions in the body. This includes the physical and chemical processes in the body that convert or use energy ().

When the level of magnesium in the body drops below normal, symptoms may develop due to low magnesium.

Common causes of low magnesium include:

  • Burns that affect a large area of the body
  • Chronic
  • Excessive urination (polyuria), such as in uncontrolled and during recovery from
  • (disorder in which the adrenal gland releases too much of the hormone aldosterone into the blood)
  • Kidney tubule disorders
  • syndromes, such as and inflammatory bowel disease
  • Medicines including amphotericin, antibodies targeting the epidermal growth factor (EGF) receptor, cisplatin, cyclosporine, diuretics, proton pump inhibitors, tacrolimus, and aminoglycoside antibiotics
  • Pancreatitis (swelling and inflammation of the pancreas)
  • Excessive sweating

    • Symptoms

    Common symptoms include:

  • Abnormal eye movements ()
  • Convulsions
  • Fatigue
  • Muscle spasms or cramps
  • Muscle weakness
  • Numbness

    • Exams and Tests

    Your health care provider will do a physical exam and ask about your symptoms.

    Tests that may be ordered include an (ECG).

    A will be ordered to check your magnesium level. Normal range is 1.3 to 2.1 mEq/L (0.65 to 1.05 mmol/L).

    Other blood and urine tests that may be done include:

  • Urine magnesium test

    • Treatment

    Treatment depends on the severity of the low magnesium problem and may include:

  • Fluids given through a vein (IV)
  • Magnesium by mouth or through a vein
  • Medicines to relieve symptoms

    • Outlook (Prognosis)

    The outcome depends on the condition that is causing the problem.

    Possible Complications

    Untreated, this condition can lead to:

  • Cardiac arrest
  • Death

    • When to Contact a Medical Professional

    When your body's magnesium level drops too much, it can be a life-threatening emergency. Call your provider right away if you have symptoms of this condition.

    Prevention

    Treating the condition that is causing low magnesium can help.

    If you play sports or do other vigorous activity, drink fluids such as sports drinks. They contain to keep your magnesium level in a healthy range.

    References

    Chonchol M, Smogorzewski MJ, Stubbs JR, Yu ASL. Disorders of calcium, magnesium, and phosphate balance. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 18.

    Pfennig CL, Slovis CM. Electrolyte disorders. In: Walls RM, ed. Rosen's Emergency Medicine: Concepts and Clinical Practice. 10th ed. Philadelphia, PA: Elsevier; 2023:chap 114.

    Schedule An Appointment

    Contact Atlanta Obsetrics and Gynaecology at The Womens Center Millennium Hospital - 404-ATL-BABY

    GO

    Review Date: 6/12/2023

    Reviewed By: Jacob Berman, MD, MPH, Clinical Assistant Professor of Medicine, Division of General Internal Medicine, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.