Alcohol reduces all skills you need to drive safely. If enough alcohol is consumed, the results can progress to drowsiness, sleep, unconsciousness, and eventually, death. Unlike most food, alcohol does not have to be digested. Once swallowed, it is absorbed directly into the bloodstream through the walls of the stomach and small intestine, usually within 20-40 minutes. If there is food in the stomach, this absorption process may be slowed.