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Cocaine metabolite screening in whole blood (e.g., benzoylecgonine)

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

This test measures levels of cocaine metabolites in your blood to help detect recent cocaine use.

Quick summary

["Detects recent cocaine exposure through blood metabolites for medical or legal purposes."]

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

Key facts at a glance

LOINC
109561-1
Short code
Cocaine Msmt Bld
Synonyms
Cocaine Msmt Bld
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
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, confusion, or if you’ve been exposed to cocaine recently. It can also be used in workplace drug testing or legal investigations.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw a blood sample. The process takes a few minutes, and you may feel slight discomfort.

What the Results Mean

Positive results indicate recent cocaine use, but they don’t confirm the exact amount or duration. High levels may suggest recent exposure, while lower levels could mean earlier use or shorter exposure.

Possible Side Effects

Most people experience minimal side effects, but you might feel slight bruising, soreness, or a small bump at the injection site. Rarely, allergic reactions can occur.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: This test helps assess acute cocaine exposure for medical evaluation, legal purposes, or monitoring substance use. Metabolites like benzoylecgonine persist in blood for hours to days, making it useful for recent detection.

Short name

Cocaine metabolite test (bld)

Frequently asked questions

How soon after use will the test show results?
Cocaine metabolites typically appear in blood within minutes to a few hours after use. Levels peak within 3–6 hours and may remain detectable for up to 24–48 hours, depending on individual metabolism.
Can food or other medications affect this test?
No, food or common medications typically do not interfere with this test. However, if you’re on blood thinners or have recent trauma, your provider may adjust testing timing.
Is this test different from urine drug screens?
Yes. This test measures metabolites in blood, which can detect recent use (within hours), while urine tests often detect metabolites for longer periods (days to weeks), depending on the substance.
  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