I drink pretty much (at least to normal standards), then again it's a common "cultural thing" here in Finland. But I must admit, I do tend to have some beers in order to be able to sleep (I have sleeping pills, but not enough of 'em).
Anyway, I know alot about hangovers, and I can tell you that it's 100% certain that hangovers make panic disorder ALOT worse. At least for me, but as it's the "official" version of the matter, I can only concur and say this:
I've got some pills (soothing ones, don't know the correct English word for them) to relax me, and I never use them, unless I'm very hung over and need to go outside and do something other than buy food and casual stuff like that.
So yea, hangovers+panic=HELL.