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Ethyl glucuronide (EtG) in urine

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

This test measures ethyl glucuronide (EtG), a metabolite of ethanol, in your urine. It helps determine if you’ve consumed alcohol recently, even if you may not feel intoxicated.

Quick summary

["Detects recent alcohol use, even after alcohol leaves your system."]

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

Key facts at a glance

LOINC
45324-1
Short code
Ethyl glucuronide Ur-mCnc
Synonyms
Ethyl glucuronide Ur-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
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’re suspected of recent alcohol use, such as after a suspected alcohol-related incident, for legal purposes, or as part of a substance use evaluation. It can also be used in workplace or safety-sensitive roles to screen for alcohol exposure.

How the Test Works

Ethyl glucuronide is produced when your body breaks down alcohol. This test detects EtG in your urine, which can remain present for up to 80 hours after alcohol consumption, depending on factors like alcohol dose and metabolism.

What to Expect Before the Test

No special preparation is needed. You’ll provide a urine sample in a private setting, similar to other urine tests. Avoiding alcohol before testing isn’t required since the test looks for its metabolite.

What the Results Mean

Positive results indicate recent alcohol exposure. The test doesn’t measure alcohol levels directly but confirms alcohol was metabolized in your body. Results are qualitative (present or absent) and not tied to specific timeframes or quantities.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Ethyl Glucuronide

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 24 to 48 hours, depending on your lab’s processing times. Follow-up with your healthcare provider to discuss the meaning of your results.
Can I drink alcohol before this test?
No, drinking alcohol before the test isn’t necessary because the test detects its metabolite (EtG), which remains in your urine for several days after consumption. However, if you’re concerned about recent alcohol use, it’s best to discuss your history with your provider.
What if my test result is positive?
A positive result means you’ve had alcohol in your system recently. Your healthcare provider will review the result with you and may recommend further testing or evaluation, such as a blood alcohol test or a substance use assessment, to understand your situation better.
  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