Haptoglobin blood test

A blood sample is needed.

Certain medicines may affect the results of this test. Your health care provider will tell you if you need to stop taking any medicines. Do not stop any medicine before talking to your provider.

Medicines that can raise haptoglobin levels include:

• Androgens
• Corticosteroids

Medicines that can lower haptoglobin levels include:

• Birth control pills
• Chlorpromazine
• Diphenhydramine
• Indomethacin
• Isoniazid
• Nitrofurantoin
• Quinidine
• Streptomycin

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. This soon goes away.

This test is done to see how fast your red blood cells are destroyed. It may be done if your provider suspects you have a type of anemia that your immune system is causing.

The normal range is 41 to 165 milligrams per deciliter (mg/dL) or 410 to 1,650 milligrams per liter (mg/L).

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.

When red blood cells are actively being destroyed, haptoglobin disappears faster than it is created. As a result, the levels of haptoglobin in the blood drop.

Lower than normal levels may be due to:

• Immune hemolytic anemia
• Long-term (chronic) liver disease
• Blood buildup under the skin (hematoma)
• Liver disease
• Transfusion reaction

Higher-than-normal levels may be due to:

• Blockage of the bile ducts
• Joint or muscle inflammation, swelling, and pain that comes on suddenly
• Peptic ulcer
• Ulcerative colitis
• Other inflammatory conditions

There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight but may include:

• Excessive bleeding
• Fainting or feeling lightheaded
• Multiple punctures to locate veins
• Hematoma (blood accumulating under the skin)
• Infection (a slight risk any time the skin is broken)

Marcogliese AN, Hensch L. Resources for the hematologist: interpretive comments and selected reference values for neonatal, pediatric, and adult populations. In: Hoffman R, Benz EJ, Silberstein LE, et al, eds. Hematology: Basic Principles and Practice. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 159.

Michel M. Autoimmune and intravascular hemolytic anemias. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 146.

Updated by: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. 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.