Actually, the best hangover cure should be taken before you pass out. Take some Advil and a multi vitamin. You should wake up feeling ok.
As far as now, the only thing I can tell you is take some Advil and choke down another drink. Usually if you wake up hungover, a drink or two will allow you to pass right back out. If you can't pass out, you're gonna have to eat something heavy and have some caffeine.
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