Histamine, 24-Hour Urine
Fasting: No

Specimen: Urine

Lab: Quest Diagnostics

Results: Test run Tues, Fri; Report available in 5 days business days

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Tests Included: Creatinine

Patient Preparation: Patient should avoid direct sunlight. Patient should avoid taking antihistamines, oral corticosteroids and substances which block H2 receptors for at least 24 hours prior to specimen collection.

Collection Instructions: Take requisition to your local Quest Patient Service Center to pick up a urine collection jug. When finished with your collection please be sure to write the total 24-hour urine volume on the container and on the test requisition.

Test Description: Histamine is a mediator of the allergic response. Histamine release causes itching, flushing, hives, vomiting, syncope, and even shock. In addition, some patients with gastric carcinoids may exhibit high concentrations of histamine. This test aids in evaluation of patients with allergic signs and symptoms, i.e. anaphylaxis. May also assist when diagnosing and monitoring mast-cell activation disorders or when evaluating histamine production over a longer time frame.