Valium is a miracle cure for hangovers, 5mg the morning after, or a beer. But using any GABA-ergics to help a hangover caused by GABA-ergics is gonna lead you down addiction fast. A safer alternative: a nice, big breakfast, plenty of water, vitamins, and fat bowl.
It will help a lot with your hangover, natural anti-nausea benefits of smoking herb if your stomach is upset, will help your headache as well... ^^^What he said about food, vitamins and water.