Calcium (Ca) in Urine

Urinary Calcium

What Affects the Test

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

• Too much or too little calcium in the diet.
• Taking medicines, such as diuretics, growth hormones, parathyroid hormone (PTH), antacids, or steroids.
• Taking too much vitamin D, lithium, laxatives, theophylline, or aspirin.
• Not collecting 24 hours of urine.
• Too much sun exposure, which affects vitamin D levels.
• Being on bed rest for a long time.

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Author:	Jan Nissl, RN, BS	Last Updated: October 25, 2006
Medical Review:	Martin Gabica, MD - Family Medicine Philip Belitsky, MD, FRCSC - Urology
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