A blood sample is needed. Most of the time, blood is drawn from a vein located on the inside of the elbow or the back of the hand.

You should not eat or drink anything for 4 hours before the test unless told otherwise.

Many medicines can interfere with blood test results.

• Your health care provider will tell you if you need to stop taking any medicines before you have this test.
• DO NOT stop or change your medicines without talking to your provider first.

This test is done to see if you have a high level of uric acid in your blood. High levels of uric acid can sometimes cause gout or kidney disease.

You may have this test if you have had or are about to have certain types of chemotherapy. Rapid destruction of cancerous cells or weight loss, which may occur with such treatments, can increase the amount of uric acid in your blood.

Normal values range between 3.5 to 7.2 milligrams per deciliter (mg/dL).

Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.

The example above shows the common measurement range for results for these tests. Some laboratories use different measurements or may test different specimens.

Greater-than-normal levels of uric acid (hyperuricemia) may be due to:

• Acidosis
• Alcohol (ethanol) consumption
• Chemotherapy-related side effects
• Dehydration
• Diabetic ketoacidosis
• Excessive exercise
• Fructose consumption
• Hyperparathyroidism
• Hypothyroidism
• Lactic acidosis
• Lead poisoning
• Leukemia
• Medicines such as cyclosporine, diuretics, nicotinic acid, salicylates (low dose), tacrolimus
• Medullary cystic kidney disease
• Obesity
• Polycythemia vera
• Psoriasis
• Purine-rich diet
• Renal failure
• Toxemia of pregnancy
• Vitamin B12 deficiency

Lower-than-normal levels of uric acid may be due to:

• Fanconi syndrome
• Hereditary diseases of metabolism
• HIV infection
• Low purine diet
• Medicines such as atorvastatin, captopril, enalapril, fenofibrate, losartan, probenecid, and trimethoprim-sulfamethoxazole
• Syndrome of inappropriate antidiuretic hormone (SIADH) secretion

Other reasons this test may be performed include:

• Chronic kidney disease
• Gout
• Injury of the kidney and ureter
• Kidney stones (nephrolithiasis)

Gout - uric acid in blood; Hyperuricemia - uric acid in blood

Dalbeth N. Clinical features and treatment of gout. In: Firestein GS, Budd RC, Gabriel SE, Koretzky GA, McInnes IB, O'Dell JR, eds. Firestein & Kelley's Textbook of Rheumatology. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 101.

Edwards NL. Crystal deposition diseases. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 257.

Weisbord SD, Palevsky PM. Prevention and management of acute kidney injury. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. Brenner and Rector's The Kidney. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 29.

Updated by: Neil J. Gonter, MD, Assistant Professor of Medicine, Columbia University, New York, NY, and private practice specializing in Rheumatology at Rheumatology Associates of North Jersey, Teaneck, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.