How long do people normally feel sick with a hangover?

Hangover: When you drink, your body metabolizes alcohol into a chemical that causes the symptoms of a hangover. Some people metabolize and excrete (get rid of) this chemical so quickly, they never have a hangover. The slower you metabolize the alcohol, the more symptoms you get. Most last for a few hours, some more than 6 hours, a ver few 8-12 hours.