As a result, you may feel stimulated, lively, a bit giddy or foolish. After two to four drinks, alcohol begins to impair your reaction time, coordination and balance. Your vision and ability to judge distance suffers, too, making it harder to react to dangers ahead. In heavy doses, alcohol can be a mood changer producing sudden shifts in mood all the way from elation to anger. Studies show a combination of alcohol and anger is responsible for much of the reckless, aggressive driving that often causes fatal highway crashes.
Food can slow down the absorption of alcohol.
This delaying action prevents large amounts of alcohol from going to your head immediately. But, if you drink a lot, eating won't prevent a high blood alcohol concentration. If alcohol is already in your bloodstream, neither aspirin, black coffee, deep breathing, a slap in the face, exercise, nor eating will sober you up. Only time will return you to normal. You can't trust yourself or your friends to judge the quality of your driving after you've had a few drinks.