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Cocaine concentration in whole blood

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

This test measures the amount of cocaine present in your blood, often used to assess recent drug exposure or to monitor for intoxication.

Quick summary

["This test helps doctors understand if cocaine has been recently used in your system."]

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

Key facts at a glance

LOINC
16633-0
Short code
Cocaine Bld Ql
Synonyms
Cocaine Bld Ql
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 like rapid heartbeat, confusion, or severe anxiety that could be linked to cocaine use. It may also be done during a drug screening or if you’re suspected of intoxication.

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 blood. The process is quick and typically painless.

What the Test Results Mean

Results are usually reported in micrograms per milliliter (µg/mL). Higher levels may indicate recent use, but interpretation depends on clinical context (e.g., time since last use, symptoms).

Possible Risks and Considerations

There are minimal risks, such as mild bruising or discomfort at the injection site. False positives can occur if other substances (like certain medications) are present, so results should be reviewed by a healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cocaine Blood Level

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times.
Can I drink alcohol before this test?
No, avoid alcohol for 24 hours before testing, as it may interfere with lab results or affect your health.
What if my results are positive?
A positive result means cocaine was detected in your blood. Your doctor will discuss next steps, which may include further testing, counseling, or treatment options based on your symptoms and history.
  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