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Urinary morphine mass concentration (24-hour collection)

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

This test measures the total amount of morphine present in your urine over a 24-hour period. It helps assess drug exposure, metabolism, or potential misuse.

Quick summary

["This test checks how much morphine you’ve processed in your body over a full day."]

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

Key facts at a glance

LOINC
3829-9
Short code
Morphine Free Ur-mCnc
Synonyms
Morphine Free Ur-mCnc
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 if you’re being monitored for opioid use, pain management, or suspected drug abuse. It can also help track how your body handles certain medications.

What to Expect Before the Test

You’ll need to collect all urine for 24 hours in a special container. Drink plenty of water to help flush out morphine naturally. Avoid foods or supplements that might interfere with results.

How the Test Works

Your urine sample is analyzed using a sensitive lab method to measure morphine levels. The test looks at the total amount, not just active metabolites.

Possible Results and Interpretation

Results are compared to reference ranges for morphine in urine, but exact values depend on factors like medication use, metabolism, and individual differences. High levels may indicate recent opioid use or misuse.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

24-Hour Urine Morphine

Frequently asked questions

What could cause elevated morphine levels in urine?
Elevated morphine levels may suggest recent opioid use (e.g., painkillers, heroin), misuse, or improper metabolism. Low levels could indicate normal processing or reduced exposure.
Could this test detect other drugs besides morphine?
This test specifically measures morphine. Other drugs (like heroin metabolites) may require separate tests. Your provider will clarify if additional screening is needed.
How long will it take to get results?
Results typically arrive within 1–3 business days, depending on your lab. Follow-up may be scheduled if further evaluation is needed.
  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