Pedialyte is the greatest thing ever invented!
When you think about it, it does make sense. It is gentle for baby tummies to counter act dehydration, whyich is what a hangover is.
And, a whole litre bottle only has 100 calories. The equivalent in gatorade is about 450.
The taste isn't great, kinda like sugary kool-aid. If you can chug a bottle the night before (when you're drunk) you won't notice the taste and not be hungover the next day.
I had to track some down in Jamaica and it was the BEST $10 I spent the entire trip!