Magnesium (Mg)
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Magnesium (Mg)
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Healthwise
What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Using medicines that contain magnesium. This includes many antacids, laxatives (such as milk of magnesia or Epsom salts), and magnesium supplements.
- Medicine. Some antibiotics, insulin, and long-term use of diuretics can lower magnesium levels.
- Recent intravenous (IV) fluids, such as fluids given during surgery.
- Pregnancy. Magnesium blood levels may normally be low in the second and third trimesters of pregnancy.
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Last Updated:
April 17, 2008- Author:
- Maria G. Essig, MS, ELS
- Medical Review:
- Kathleen Romito, MD - Family Medicine
Brian D. O'Brien, MD - Internal Medicine
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