Test Information

Test Name



5-Hydroxy indoles; Carcinoid Screen; 5HIAA; Hydroxyindoleacetic Acid Urine



Price Disclaimer

Many services are free for eligible patients. A minimum charge may apply. Prices listed are for unfunded, individual, requests. Please contact us for commercial testing.

Preferred Specimen

24 Hour Urine (Plain or Acid)

Testing Location


Turn Around Time

3 days

Collection Information

Patient Requestable


Patient Instructions


  • Some medications and foods (see below) could interfere with test results.

  • For 48 hours before patients start their urine collection and during the 24 hours they collect urine limit the following to one serving per day: Fruits, Vegetables, Nuts (other than the list below)

  • During the same period, avoid completely: avocados, dates, eggplant, bananas, cantaloupe, grapefruit, kiwifruit, melons, pineapple, plantains, plums, hickory nuts, butternuts, pecans, walnuts, tomatoes and tomato products.

  • Caffeinated beverages such as tea and coffee or caffeinated foods should also be avoided for 48 hours before and during specimen collection.

  • If clinically feasible and after consultation with your doctor, discontinue the following medications at least 48 hours before specimen collection:

  • Acetaminophen (paracetamol)

  • Aspirin

  • Antihistamines

  • Cough syrups

  • Cold and flu medications

  • Levodopa

  • Methyldopa

  • Phenothiazines

Processing Information

Registration Code



  • 5-HIAA only available in urine testing, no serum/plasma testing available.



View Interpretations

External Referral Information

Referral Location

Canterbury Health labboratry (via WHL)

Send Away Notes

24 hour urine collection is the preferred sample type. Random samples will be analysed but no reference interval is available

Send Away Transport


External Lab Website