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Ethanol in Blood (Mass Concentration)

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

This test measures the amount of alcohol (ethanol) present in your blood, typically used to assess recent alcohol consumption or evaluate for alcohol intoxication.

Quick summary

["Helps determine if alcohol was recently consumed or if it’s affecting your health."]

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

Key facts at a glance

LOINC
56478-1
Short code
Ethanol Bld GC-mCnc
Synonyms
Ethanol Bld GC-mCnc
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
gc
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 Matters

Blood alcohol levels can indicate intoxication, guide medical treatment for alcohol poisoning, or help diagnose conditions like alcohol use disorder. It’s also used in legal or workplace settings to assess compliance with alcohol limits.

How the Test Works

Your blood sample is analyzed using a chemical method (likely immunoassay or enzymatic detection) to measure ethanol concentration. Results are usually reported in milligrams of alcohol per deciliter (mg/dL) of blood.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm, and a blood sample will be drawn. If you’ve recently consumed alcohol, your level may be higher than usual.

What the Results Mean

Results are compared to standard reference ranges (varies by lab and context). High levels may suggest recent alcohol use, intoxication, or other health concerns. Always discuss results with your healthcare provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Blood Alcohol Level

Frequently asked questions

How often do I need this test?
This test is often ordered for specific situations like legal evaluations, workplace screenings, or medical emergencies (e.g., alcohol poisoning). Your doctor may recommend it periodically if you have a history of alcohol use or related health issues.
Can I drink alcohol before this test?
Avoid alcohol for at least 24 hours before testing if possible, as recent consumption can affect results. If you must drink, inform your healthcare provider so they can interpret the results accurately.
What if my results are abnormal?
If your blood alcohol level is elevated, your doctor may recommend further evaluation (e.g., alcohol use counseling, monitoring for alcohol-related health issues, or treatment for intoxication). Follow-up may include additional tests or discussions about lifestyle changes.
  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