Calcium (Ca) in Blood

Blood Calcium

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Drinking too much milk or using too much antacid, calcium salt, or calcium supplement.
• Taking medicines, such as diuretics, acetazolamide (Diamox), albuterol, estrogen, birth control pills, corticosteroids, and some medicines that control seizures.
• Taking too much vitamin D, lithium, laxatives, theophylline, or aspirin.
• Having many blood transfusions in a short period of time.

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Author:	Monica Rhodes	Last Updated: September 29, 2008
Medical Review:	E. Gregory Thompson, MD - Internal Medicine Tushar J. Vachharajani, MD, FASN, FACP - Nephrology
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