Uric Acid In Blood: What Affects The Test


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What Affects the Test


  • Some medicines may increase the level of uric acid in the blood. These include diuretics, theophylline (such as Theo-Dur, Theo-X, and Theochron), low-dose aspirin (75 to 100 mg daily), and some medicines used to treat tuberculosis.
  • The vitamin niacin, high doses of vitamin C, caffeine, and a substance found in chocolate and tea (theobromine) can cause uric acid levels to be inaccurately high.
  • Excessive use of alcohol, starvation, a high-protein diet, or strenuous exercise can raise the level of uric acid in the blood.


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Last updated: October 31, 2007
Author: Maria G. Essig, MS, ELS
Reviewed By: E. Gregory Thompson, MD - Internal Medicine, Stanford M. Shoor, MD - Rheumatology
Editors: Susan Van Houten, RN, BSN, MBA, Tracy Landauer

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