Medically reviewed by Steffini Stalos, DO Key Takeaways Alcohol can be detected in urine for up to 72 hours after heavy use. Ethyl glucuronide (EtG) tests can show alcohol use up to 80 hours later.

Alcohol can be detected in a urine test for up to 24 hours. After heavy alcohol consumption, the urine will likely test positive for alcohol for 72 hours or more, depending on how much was consumed.

One patient had multiple false positive toxicology tests after taking a popular diabetes drug. Despite not ingesting alcohol for over 10 months, a man in his early 60s tested positive for ethanol in ...