Even if you've been to sleep after drinking, there could still be high levels of alcohol in your system, and this could be enough Drink driving limit outside the UK.
To keep health risks from alcohol to a low level if you drink most weeks: men and women are advised not to drink more than 14 units a week on a regular basis .
Alcohol makes you pee more, which can lead to dehydration. Dehydration is what causes many hangover symptoms. Find out how to avoid a hangover and .