Skip to content

Cocaine metabolite (benzoylecgonine) in urine, mass concentration

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

This test detects cocaine and its breakdown product (benzoylecgonine) in your urine. It helps determine if you’ve recently used cocaine.

Quick summary

["This test checks for recent cocaine use by measuring its breakdown product in urine."]

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

Key facts at a glance

LOINC
77790-4
Short code
Cocaine CtO Sal Cfm-mCnc
Synonyms
Cocaine CtO Sal Cfm-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
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’ve been exposed to cocaine, are suspected of using it, or are part of a drug screening program. It can also be used in medical settings to monitor treatment progress or assess substance use during pregnancy.

What to Expect Before the Test

No special preparation is needed. You’ll provide a urine sample in a private area, similar to other routine urine tests. Avoiding certain medications or substances (like some painkillers) before testing may be advised by your provider—always follow their instructions.

What the Test Results Mean

Positive results indicate recent cocaine use, while negative results suggest no detectable cocaine or its breakdown product in your system. However, results can vary based on how recently you used cocaine and individual metabolism.

Possible Causes of Abnormal Results

False positives or negatives can occur due to other substances (like certain medications) or lab errors. If your results are unclear, your provider may repeat the test or order additional tests for confirmation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Cocaine metabolite urine test

Frequently asked questions

What does a positive result mean?
A positive result strongly suggests recent cocaine use, which may impact treatment decisions, legal proceedings, or medical care. It’s important to discuss your results with your healthcare provider to understand next steps.
How soon after use will the test detect cocaine?
Cocaine and its metabolite may be detectable in urine for up to 3–5 days after use, depending on individual metabolism and frequency of use. Results can’t pinpoint the exact time of use.
Can other substances affect this test?
Yes, some medications (like certain painkillers or antidepressants) may interfere with test accuracy. Always inform your provider about all medications or supplements you’re taking.
  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