Only if you want to stay awake and have a worse hangover. Both alcohol and caffeine are diuretics, and will cause you to become dehydrated. Dehydration is the principle cause of hangovers. The best...
A normal sized adult should drink approximately 2 litres of water in 24 hours in cool weather and 3 litres or more in hot weather. If the weather is cold and you have the heating on, you will need to...