How Long Does It Take For Bac To Go Down? A typical, healthy liver can process about 1 standard drink per hour. This means it will typically take about 1 hour for alcohol to leave the body for each standard drink consumed. For instance, if 3 drinks are consumed around 8:00 PM, the alcohol will have left the body by about 11:00 PM. However, this time period becomes a lot less straightforward when additional drinks are consumed with the hour and gives the liver more to constantly process.