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Cocaine (Mass Concentration in Plasma)

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

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

Quick summary

["This test helps doctors understand if you’ve recently used cocaine."]

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

Key facts at a glance

LOINC
69009-9
Short code
Cocaine Mec Cfm-mCnt
Synonyms
Cocaine Mec Cfm-mCnt
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, suspected of using it, or experiencing symptoms like rapid heart rate, confusion, or seizures that might be linked to cocaine use. It can also be part of a broader drug screening, especially in medical, legal, or workplace settings.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for a few hours before the blood draw if instructed by your provider. Bring a list of medications you’re taking, as some can affect test results.

How the Test Is Done

A healthcare professional will draw blood from a vein in your arm. The sample is then sent to a lab for analysis using a high-performance liquid chromatography (hplc) method to detect and measure cocaine levels.

What the Results Mean

Results are typically reported as a mass concentration (e.g., micrograms per milliliter). Higher levels may indicate recent use, while lower or undetectable levels suggest no recent exposure. Interpretation depends on clinical context, such as symptoms or timing since last use.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Cocaine in Plasma

Frequently asked questions

What does a high level of cocaine in my blood mean?
High levels may indicate recent cocaine use, which can affect your heart, brain, and other organs. It can also be used in legal or workplace settings to assess compliance with drug-free policies. Always discuss results with your provider to understand their specific implications for your health or situation.
How long does it take to get my results?
Results are usually available within 1 to 3 business days, depending on your lab. Your provider will contact you with the findings once they’re ready. If you have urgent concerns, ask your provider how quickly you can expect results.
Can food or medications affect this test?
Some medications (like certain antidepressants or stimulants) may influence test results, but fasting is not required unless directed by your provider. Always inform your healthcare team about all medications or supplements you’re taking to avoid false results.
  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