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Urinary Opioid Concentration (Morphine and Related Metabolites)

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

This test measures the presence of morphine and other opioid-related compounds in your urine. It’s often used to detect recent opioid use, including prescription painkillers or illicit substances.

Quick summary

["This test helps track opioid exposure, which can inform treatment decisions or monitor compliance with medication protocols."]

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

Key facts at a glance

LOINC
86453-8
Short code
O-nortramadol Ur Ql
Synonyms
O-nortramadol Ur Ql
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 This Test Is Done

Your healthcare provider may order this test to check for recent opioid use—such as after surgery, during addiction treatment, or if you’ve been prescribed opioids. It can also help assess substance use patterns or screen for misuse.

How the Test Works

A small urine sample is collected and analyzed to detect morphine and its metabolites. The method typically involves immunoassay or chromatography to identify these compounds.

What to Expect Before the Test

No special preparation is needed, but you may be asked to provide a clean-catch urine sample. Avoiding certain foods or medications (like some painkillers) before testing may be advised by your provider.

What the Results Mean

Positive results indicate recent opioid exposure, while negative results suggest no detectable opioid compounds in your urine. Results are qualitative (yes/no) rather than quantitative, so they don’t provide exact amounts.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: This test is critical for monitoring opioid use, guiding treatment plans for addiction, or verifying compliance with medication-assisted therapy. It can also help identify potential misuse or detect recent exposure to opioids.

Short name

Urinary Opioid Screen

Frequently asked questions

What does a positive result mean?
A positive result means your urine contained detectable levels of morphine or related opioids within a short timeframe (often hours to days). This could indicate recent use, but it doesn’t confirm the type of opioid or exact amount.
Can I drink water before this test?
Yes, you can drink water as usual, but avoid excessive hydration that might dilute the sample. Follow any specific instructions your provider gives you, as some tests may require a certain urine concentration.
Will this test show long-term opioid use?
No, this test primarily detects recent opioid exposure. For long-term monitoring, other tests (like blood or hair analysis) may be used, as they can show cumulative exposure over time.
  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