Alcohol can be detected in sweat, urine and the breath for at least as long as the liver is breaking down alcohol. Alcohol stays in your system for between one and three hours, but urine tests and breathalyzers detect alcohol use for up to 24 hours. Hair tests can determine if you drank alcohol in the past 90 days. May detect alcohol consumption from 12 to 24 hours on conventional drug testing. The timeline might vary based on consumption, frequency, age, sex, and weight. In simpler terms, it usually takes a grown male one hour to process one drink. How long alcohol will remain in your body depends...