Ethyl glucuronide (EtG) in urine

What Does This Test Measure?

Ethyl glucuronide (EtG) is a chemical produced when your body breaks down alcohol. Unlike traditional blood alcohol tests, which only show recent drinking, this test can detect alcohol use that occurred days earlier. It’s often used in workplace safety programs, legal cases, or to monitor long-term alcohol exposure.

Why Might You Need This Test?

Your healthcare provider may order this test if you’ve been suspected of alcohol misuse, if you’re participating in a substance abuse program, or if you need to confirm alcohol use in a legal or workplace context. It’s also sometimes used to screen for alcohol dependence or to monitor recovery.

Sample Collection and Preparation

A urine sample is collected in a sterile container. The test uses a specialized laboratory method (likely high-performance liquid chromatography or immunoassay) to measure the presence of EtG. No special preparation is needed, but you should avoid drinking alcohol for about 80 hours before testing.

How the Results Are Interpreted

Results are qualitative (positive or negative) rather than quantitative. A positive result indicates recent alcohol consumption, but it doesn’t specify the amount or timing. Interpretation depends on clinical context, such as the reason for testing.