So No-One Ever Has To Ask Again.

The ultimate hangover cure is: Suck up your pain, shower, get dressed, walk to your local deli, buy a Powerade and a sandwich/pie/sausage roll/something greasy and savoury (possibly a sweet if you're tasting salt too much and it makes you sick) and walk home. That will fix you, or at least get you functioning again. Proven with some kind of science. Also, drink tonnes of water.