Serum morphine concentration (mass concentration)
This test measures the amount of morphine present in your blood serum. It helps assess drug exposure, monitor treatment, or investigate symptoms related to morphine use.
["This test checks your blood for morphine levels to guide medical decisions about pain management or substance use."]
Key facts at a glance
- LOINC
- 19603-0
- Short code
- Morphine Free CtO Ur Scn-mCnc
- Synonyms
- Morphine Free CtO Ur Scn-mCnc
- 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 This Test Is Done
Your healthcare provider may order this test if you’re taking morphine medications, experiencing symptoms like drowsiness, confusion, or respiratory issues, or if you’re being evaluated for opioid use. It can also be used to confirm overdose or assess compliance with treatment plans.
What to Expect Before the Test
No special preparation is needed, but avoid eating or drinking for at least 8 hours before the blood draw. Wear comfortable clothing and plan to rest during the procedure. Bring any medications you’re currently taking to discuss with your provider.
During the Test
A healthcare professional will insert a small needle into a vein in your arm to collect blood. You may feel a brief pinch, but it’s usually over quickly. The blood sample is then sent to a lab for analysis.
After the Test
You can return to your normal activities immediately. Apply gentle pressure to the site to stop any bleeding, and check for signs of infection (redness, swelling, or fever) over the next few days. Avoid heavy lifting or strenuous activity for 24 hours.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High morphine levels may indicate overdose, improper dosing, or drug interactions. Low levels could suggest poor absorption, liver issues affecting metabolism, or non-compliance with treatment. This test helps doctors adjust pain management plans, monitor addiction risks, or diagnose underlying conditions affecting drug processing.
Short name
Serum morphine level
Frequently asked questions
How long does it take to get results?
Can I fast before this test?
What if my morphine level is too high?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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