Dear Dr. Ken,
How much water should one drink in a night where one is drinking a lot of alcohol?
As much as possible! I order an ice-water chaser with every drink. The more water you drink, the less likely you are to experience alcohol-related dehydration. Also, you will urinate more, causing you to get rid of more blood ethanol and acetaldehyde that can cause a hangover.
- Dr. Ken Krul