Cocaine Mass Concentration in Serum (24-Hour Urine)
This test measures the amount of cocaine present in your urine over a 24-hour period, reflecting recent drug use.
["This test helps track recent cocaine exposure and supports treatment decisions."]
Key facts at a glance
- LOINC
- 5941-0
- Short code
- Deprecated Cocaine Ser-mCnc
- Synonyms
- Deprecated Cocaine Ser-mCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your healthcare provider may order this test if you have concerns about substance use, are undergoing treatment for addiction, or are required to screen for drug use in certain settings (e.g., employment, legal reasons). It helps monitor compliance with treatment plans or identify recent use.
What Does the Test Involve?
You’ll provide a urine sample collected over a full day. The lab analyzes it for cocaine metabolites, which indicate recent ingestion. This test is not used to detect long-term storage of cocaine in your body.
What Are Common Results?
Results are typically reported as a positive or negative for cocaine metabolites. A positive result suggests recent use, but it does not indicate the exact amount or timing of use. Interpretation depends on clinical context.
What Does a Positive Result Mean?
A positive result means your urine contained detectable cocaine metabolites, which could mean you used cocaine within the past 24 hours. This may prompt further evaluation or adjustments to your care plan.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is useful for short-term monitoring of substance use but is not definitive for chronic use. It can support treatment decisions, such as adjusting medication, therapy, or support programs. False positives may occur due to other drugs or metabolic factors, so results should be reviewed by a healthcare provider.
Frequently asked questions
Why might my test results be different from what I expected?
Can I still use cocaine if my test is positive?
How long does it take to get my test results?
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