The potassium urine test measures the amount of potassium in a certain amount of urine.
After you provide a urine sample, it is tested in the lab. If needed, the health care provider may ask you to collect your urine at home over 24 hours. Your provider will tell you how to do this. Follow instructions exactly so that the results are accurate.
Your provider may ask you to temporarily stop taking any medicines that may affect the test results. Tell your provider about all the medicines you take, including:
DO NOT stop taking any medicine before talking to your provider.
This test involves only normal urination. There is no discomfort.
Your provider may order this test if you have signs of a condition that affects body fluids, such as dehydration, vomiting, or diarrhea.
It may also be done to diagnose or confirm disorders of the kidneys or adrenal glands.
The usual range for a person on a regular diet is 25 to 125 mEq/L per day. Lower or higher urinary level may occur depending on the amount of potassium in your diet and the amount of potassium in your body.
The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.
A higher than normal urine potassium level may be due to:
Low urine potassium level may be due to:
There are no risks with this test.
Batlle D, Chen S, Haque SK. Physiologic principles in the clinical evaluation of electrolyte, water, and acid-base disorders. In: Alpern RJ, Orson WM, Caplan M, eds. Seldin and Giebisch's The Kidney. 5th ed. Waltham, MA: Elsevier Academic Press; 2013:chap 74.
Kamel KS, Davids MR, Lin S-H, Halperin ML. Interpretation of electrolyte and acid-base parameters in blood and urine. In: Skorecki K, Chertow GM, Marsden PA, Taal MW, Yu ASL, eds. Brenner and Rector's The Kidney. 10th ed. Philadelphia, PA: Elsevier; 2016:chap 27.BACK TO TOP
Review Date: 7/15/2017
Reviewed By: Laura J. Martin, MD, MPH, ABIM Board Certified in Internal Medicine and Hospice and Palliative Medicine, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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