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Ethyl glucuronide (EtG) in urine

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

This test measures ethyl glucuronide, a metabolite of ethanol (alcohol), found in urine. It helps assess recent alcohol consumption.

Quick summary

["Detects alcohol use within days after drinking."]

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

Key facts at a glance

LOINC
55349-5
Short code
Ethyl glucuronide Ur Ql
Synonyms
Ethyl glucuronide Ur Ql
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 suspect 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 treatment programs to monitor alcohol exposure.

How the Test Works

Ethyl glucuronide is formed when your body processes alcohol. This test detects its presence in urine, which can linger for several days after drinking, unlike alcohol itself, which is typically cleared within hours.

Sample Collection

You’ll provide a urine sample, typically collected in a sterile container. The test is usually done in a lab setting, and results are interpreted by a healthcare professional.

What to Expect Before the Test

No special preparation is needed, but avoid drinking alcohol for at least 24 hours before testing if possible, as it may affect results. Hydration is generally encouraged.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Ethyl Glucuronide (EtG) Test

Frequently asked questions

Ethyl glucuronide is a reliable marker for recent alcohol exposure, offering a window of detection longer than standard breath or blood alcohol tests. It can help distinguish between acute intoxication and chronic alcohol use patterns.
This test is not used to diagnose alcoholism but can be part of a broader assessment for substance use disorders, legal investigations, or workplace compliance.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your healthcare provider will discuss findings with you.
Can false positives occur?
Rarely, but factors like certain medications or metabolic conditions may influence results. A healthcare provider will review your medical history and confirm interpretation.
  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