Test Catalog

Test ID: FH24U    
Histamine, 24-Hour Urine

Specimen Type Describes the specimen type validated for testing


Specimen Required Defines the optimal specimen required to perform the test and the preferred volume to complete testing

Patient Preparation: Avoid taking allergy causing drugs, antihistamines, oral corticosteroids, and substances which block H2 receptors for at least 24 hours prior to specimen collection. Avoid direct sunlight during the collection.

Specimen Type: Urine

Submission Container/Tube: Plastic, 10-mL tube (T068)

Specimen Volume: 4 mL

Collection Instructions: Submit only 1 of the following:


-Collect 24-hour urine with 10 mL 6N HCL. (Preferred)

-Collect 24-hour urine without preservative.


1.    Collect urine for 24 hours, either with 10 mL 6N HCL preservative (preferred), or with no preservative.

2.    Avoid direct sunlight during the 24-hour collection.

3.    Send specimen refrigerated in the plastic, 10-mL urine tube (T068)

4.    Collection volume and duration are required

Specimen Minimum Volume Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory

2 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected




Warm < 48 hours OK; Cold OK






Random Urine

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

Specimen TypeTemperatureTime
UrineRefrigerated (preferred)14 days
 Frozen 14 days
 Ambient 48 hours