Ondansetron
"I was extremely hungover and was vomiting for about 14 hours non-stop before being prescribed Zofran. I know it seems silly to get medication for a hangover, but I was becoming dangerously dehydrated from the binge drinking and heavy vomiting, as I was unable to keep even a sip of water down. Not even ten minutes after taking the medicine (dissolvable pills), I already felt significant relief from the nausea, and therefore the vomiting as well. A bit expensive, but completely worth it."