Should have bought a bottle of that quinine from Chad Nicholls... if he was going to take a diuretic, which was a mistake of course.
Dorian had a glass of wine the night before a show
It has a relaxing effect and is a mild diuretic
Why do you think you have a headache in the morning after a few drinks?
Its because you are dehydrated
I did some google research about hangovers way back. Dehydration was one possible cause of headaches but there's something else going on, spirits like cognac cause subjectively worse hangovers than vodka for example. I think beers were also worse than vodka. Drinking alcohol to relax the night before, ok, or taking it pre-stage to feel warm and a little bit of vasodilation, ok too, but relying on alcohol as a diuretic when you are already taking diuretics seems like a bad idea to me, imagine a hangover, now imagine that hangover if you also took lasix lol, the combo could easily kill you.
The one and only show I did I drank several glasses of white wine, had to be dry white wine lol, the night before and felt like death on show day.