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Noroxymorphone concentration (substance concentration in urine)

Published: August 9, 2026Updated: August 16, 2026

This test measures the presence of noroxymorphone, a metabolite of oxymorphone, in your urine. It is often used to screen for opioid use.

Quick summary

["This test helps assess recent opioid exposure through urine samples."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
89302-4
Short code
Noroxymorphone Ur Ql Scn
Synonyms
Noroxymorphone Ur Ql Scn
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms suggestive of opioid use, such as drowsiness, confusion, or respiratory issues. It may also be part of a broader drug screening, especially in medical, legal, or workplace settings.

Sample Collection and Preparation

You’ll provide a urine sample, typically collected in a sterile container. The sample is sent to a lab for analysis using a high-performance liquid chromatography (hplc) method to detect noroxymorphone.

What to Expect During Testing

No special preparation is needed, but you may be asked to avoid certain medications or substances that could interfere with results. Follow your provider’s instructions carefully.

Interpreting Results

Results are qualitative (positive or negative) and indicate whether noroxymorphone was detected in your urine. A positive result suggests recent opioid exposure, but it does not confirm the source or duration of use.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Noroxymorphone

Frequently asked questions

What does a positive result mean?
A positive result means noroxymorphone was found in your urine, indicating recent opioid use. This could be due to prescribed pain medication, illegal opioids, or other substances metabolized into noroxymorphone.
Can I take certain medications before this test?
Some medications or substances may interfere with results. Always inform your provider about all medications, supplements, or recent exposures (e.g., cleaning products) that could affect the test.
How long after opioid use might I test positive?
Detection depends on the substance and individual metabolism. Noroxymorphone may appear in urine within hours to days after use, but results can vary widely.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy