24 Hour Urine Collection for HIAA (5-Hydroxyindole Acetic Acid)

24 Hour Urine Collection for HIAA (5-Hydroxyindole Acetic Acid)


Important – Specimen labelling and delivery:

  • Ensure full first and last names and date of birth (dd/mm/yy) are clearly written on the 24 hour urine container
  • Ensure date and time of collection is written on the request form and specimen container
  • Take the specimen to a Awanui Labs Collection Centre as soon after collection as possible

24 hour urine container:

You have been provided with a container to collect a 24 hour urine sample.

Caution: ACID preservative has been added to the container

  • Store container out of reach of children
  • Do not discard the acid preservative in container before commencing collection
  • Do not void urine directly into the 24 hr urine container
  • Void urine into another clean container first and transfer the urine into the 24 hr urine container

Special Requirements:

The following substances should,be discontinued for 3 days before and also during the 24 hr collection period of your urine sample.  (Please consult your doctor if you are uncertain about temporarily ceasing any of the listed drugs).

Methyldopa (Aldomet)
Naproxen Cough mixture
Fruits and fruit juices (including avocado, banana, dates, plum, grapefruit, kiwifruit, pineapple)Phenothiazines  (Largactil, Stemetil, Modecate)


  • Start the collection early in the morning and record the date and time on the 24 hour urine container label
  • Completely empty bladder at this time and DISCARD the urine
  • During the next 24 hours, collect ALL urine passed into the clean container and transfer into the 24 hour urine container
  • Exactly 24 hours after the start time, empty your bladder, collect the urine and transfer to 24 hr urine container
  • Record the completion date and time on the 24 hr urine container label, then store in a cool place

For further information, please call 09 574 7399

Date Issued: 01/05/2021 PCS-PI-009
Authorised by: HOD, Patient Services