Skip to content

Cocaine Mass Concentration in Urine (24-hour collection)

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

This test measures the total amount of cocaine and its metabolites found in your urine over a 24-hour period. It helps assess recent drug use.

Quick summary

["Detects recent cocaine exposure in your urine over a full day."]

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

Key facts at a glance

LOINC
26758-3
Short code
Cocaine Stl-mCnt
Synonyms
Cocaine Stl-mCnt
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms of cocaine use, such as rapid heart rate, trouble sleeping, or changes in mood. It’s also used in workplace drug testing or before certain surgeries to ensure safety.

What to Expect Before the Test

You’ll collect all your urine in a container over 24 hours. Some labs may provide a kit with instructions. Avoid drinking excessive fluids to concentrate your urine, but don’t stop fluids unless directed.

What Happens During the Test

After collecting your urine, it’s sent to a lab where it’s analyzed for cocaine and its breakdown products. The lab uses a sensitive detection method to measure the total amount present.

What the Results Mean

A positive result means cocaine or its metabolites were detected in your urine. The amount can indicate recent use, but it doesn’t show how much was consumed. False positives can occur if you’ve taken certain medications or have other conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is useful for confirming recent cocaine use, especially in cases where other tests (like blood or saliva) may not detect it. It’s often used in medical settings to assess substance use disorders, monitor treatment progress, or screen for drug use before procedures. However, it’s not a definitive test for long-term use or addiction.

Short name

24-Hour Urine Cocaine Test

Frequently asked questions

How long does it take to get the results?
Results are typically available within 1–3 business days, depending on the lab’s processing time.
Can I drink alcohol before this test?
Alcohol itself won’t affect the test, but it may dilute your urine. Follow your lab’s instructions on fluid intake to ensure accurate results.
What if I miss collecting urine for part of the day?
If you miss any urine collection, you may need to restart the 24-hour period. Some labs may accept partial collections if explained clearly, but consistency is key for accurate results.
  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