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Cocaine concentration in urine (qualitative or quantitative screening/confirmation)

Published: August 9, 2026Updated: August 17, 2026

This test checks for the presence of cocaine or its metabolites in your urine, often used to screen for recent drug use.

Quick summary

["This test helps detect cocaine exposure, which may be relevant for medical, legal, or workplace reasons."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
38384-4
Short code
Cocaine Gast Ql
Synonyms
Cocaine Gast Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
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 This Test Is Done

Your healthcare provider may order this test if you have symptoms of cocaine use, such as rapid heart rate, confusion, or unusual behavior. It could also be part of a routine screening, pre-employment check, or legal evaluation.

How the Test Works

Cocaine is broken down in the body into metabolites (chemical byproducts) that appear in urine. This test detects these metabolites using a sensitive method, such as immunoassay or chromatography, to confirm recent drug exposure.

Sample Collection

You’ll provide a urine sample, typically collected in a sterile container. Follow your healthcare provider’s instructions to ensure accuracy.

Test Results Interpretation

Results are qualitative (positive/negative) or quantitative (measuring exact amounts), depending on the test type. A positive result indicates recent cocaine use, but it doesn’t confirm the exact timing or amount.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Urine Cocaine Test

Frequently asked questions

A positive result may signal recent substance use and could prompt further evaluation, such as counseling or treatment referrals. It’s important to note that false positives can occur due to other drugs or medications, so follow-up testing may be needed.
This test is not a definitive diagnosis but rather a screening tool. If you have concerns about substance use, discuss them openly with your healthcare provider.
What does a positive result mean?
A positive result suggests recent cocaine exposure, but it doesn’t indicate how much was used or for how long. It may trigger further testing or support for substance use treatment if needed.
Can false positives happen?
Yes, false positives can occur due to other drugs, certain medications, or even exposure to cocaine-related products. Your provider will clarify results and may recommend additional testing if 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 17, 2026. · Read our editorial policy