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Cocaine metabolite concentration (benzoylecgonine) in urine

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

This test detects the presence of cocaine metabolites in your urine, helping identify recent cocaine use.

Quick summary

["This test screens for cocaine use, not current intoxication levels."]

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

Key facts at a glance

LOINC
91049-7
Short code
Cocaine+BZE Tiss Ql Scn
Synonyms
Cocaine+BZE Tiss Ql Scn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
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 heartbeat, anxiety, or trouble sleeping. It can also be used in workplace drug testing, legal proceedings, or before certain surgeries to ensure safety.

What to Expect Before the Test

No special preparation is needed. You’ll provide a urine sample in a private area. If you’re pregnant, breastfeeding, or have a medical condition, let your provider know before testing.

What the Test Measures

The test measures benzoylecgonine, a metabolite of cocaine that remains in the body for several days after use. It’s one of the most common markers for recent cocaine exposure.

What the Results Mean

A positive result means detectable levels of cocaine metabolites were found. A negative result means no detectable metabolites were present in the sample. Results alone don’t indicate the amount or frequency of use.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Interpretation and Next Steps

Short name

Benzoylecgonine (BZE) Urine Drug Screen

Frequently asked questions

How long does cocaine stay in urine?
Cocaine metabolites like benzoylecgonine can remain in urine for up to 3–5 days after use, depending on individual metabolism and frequency of exposure. However, results don’t show the exact timing of last use.
What does a positive result mean?
A positive result suggests recent cocaine use but doesn’t confirm the amount or duration. It may prompt further evaluation, such as additional testing or counseling, depending on your situation.
Can false positives occur?
While rare, false positives can happen due to cross-reacting substances or certain medications. Your provider will discuss results and next steps with you based on clinical context.
  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