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Opiates
Also known as : [Codeine],[Morphine]


Urine
Test performed by: LabPLUS Toxicology


Specimen Collection

Casual urine


Reference Intervals

REPORT: The screen is reported as either Detected or Not Detected (qualitative result only).

Uncertainty of Measurement : 10% at the level of 300 ng/mL.



Turnaround Time: Within 1 day

Availability : Drug screens can be performed after hours and on weekends for urgent samples (AED/CED), or if approved by the on-call Chemical Pathologist. The request form must be clearly marked ' Urgent' and the laboratory must be alerted by telephone (via Lablink) before the sample is sent.


Assay Method

Principle : Immunoassay


Diagnostic Use and Interpretation

Drugs Detected:

This is a screening test that detects the following opiate class drugs:

The assay does not differentiate between these drugs. If a positive result is obtained, mass spectrometry can be performed to determine the type of opiate present (e.g. morphine, codeine)

The following drugs may cause 'Opiate Detected' immunoassay at high levels

Confirmation for the presence/absence of other opiate compound would require further definitive analysis. Please contact the Toxicology laboratory if required.

  • Ingestion of some types of poppy seed cake can produce a positive result.

    Drugs not detected by Opiate immunoassay :

    • Methadone
    • pethidine
    • tramadol

    Please request these specifically if required.

    Also see Drug Screen (for Clinical Management) and Drug Screen (for Evidential Purposes).

  • Drug Screen- Clinical management

    Drug Screen- Evidential purposes


    Contact Information

    The chemical pathology team can be reached via email: chemicalpathologist@adhb.govt.nz or via Lablink (09) 307 4949 ext 22000 or 09-3078995

    Emails will receive priority attention from the on-call chemical pathologist. Include the patients NHI.

    After-hours: contact Lablink (Auckland City Hospital ext. 22000 or 09-3078995) or hospital operator for on duty staff after hours .




    Last updated at 11:42:03 16/01/2026