Alcohol does not have a ‘half life’ like otherdrugs and passes rapidly through your system.Alcohol is metabolized at a constant rate, butsome people may feel the effects of alcohol forlonger amounts of time. After excessive alcoholconsumption you may find that your BAC (bloodalcohol concentration) is still over the legal limitseveral hours after you have ceased drinking.BAC refers to the amount of alcohol in your bloodin relation to the amount of water in your blood.