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Cocaine Benzoylethanol Concentration (Serum/Plasma)

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

This test measures the presence of benzoylethanol, a metabolite of cocaine, in your blood. It helps assess recent cocaine exposure.

Quick summary

["This test helps doctors check for recent cocaine use by detecting its breakdown product in your bloodstream."]

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

Key facts at a glance

LOINC
91038-0
Short code
Cocaine+BZE Fld Ql Scn
Synonyms
Cocaine+BZE Fld 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’ve been exposed to cocaine, if you’re suspected of intoxication, or if you’re undergoing treatment for substance use. It can also be part of a broader evaluation for overdose or poisoning.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw a blood sample. If you’re nervous, let your provider know—they can help make it more comfortable.

What Happens During the Test

The blood sample is sent to a lab where it’s analyzed using a specialized method to detect benzoylethanol levels. Results are typically available within 1–3 business days.

What the Results Mean

Higher levels may indicate recent cocaine use, but they don’t prove intent or duration of exposure. Results are used alongside clinical judgment, symptoms, and other tests for a full picture.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated levels of benzoylethanol can support a diagnosis of acute cocaine intoxication or recent use, especially when combined with other clinical findings. It’s important to note that this test alone cannot confirm past use or addiction. Results may also be affected by factors like hydration status, metabolism, or recent food intake.

Short name

Cocaine Benzoylethanol (CBE) Level

Frequently asked questions

How long does it take to get results from this test?
Results are usually available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will contact you once they have the results.
Can I eat or drink before this test?
No special dietary restrictions apply, but avoid heavy meals or alcohol before the blood draw if instructed by your provider. Drink water as usual unless advised otherwise.
Will this test show if I’ve used cocaine in the past?
No, this test measures benzoylethanol, a metabolite of cocaine, to detect recent use. It won’t show past use unless combined with other tests like urine drug screens or hair analysis.
  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