There are hydration products available that do not contain all the sugar and food coloring that come in products like gatorade and powerade. My favorite is NUUN electrolyte tabs. They come in tab form and go into plain water. I also have clear fluid that I add to water for when I need hydration right away. It is Lytebalance electrolyte concentrate. There are other versions as well as the world health organization WHO formula powder packets. Some products are listed for helping with hangovers - which are usually when people are dehydrated.
I have ordered these from NUUN directly, amazon and ebay plus some are in my local food stores. The ones in local retail stores cost more where I live.
I use to need to get iV fluids as well.