Like a few people say i don't think alcohol has had any long term adverse effects on my HPPD but the hangovers are a killer!
Pre-HPPD i never got hangover, even when i first got HPPD i never got hangover maybe it was because i was young but as soon as i hit 18/19 BANG, i would wake up feeling like a 80 year old man who's just been head to head with Mike Tyson in a ring.
If i drank a lot of water before going to sleep it would help a lot the next day. I'm talking about 1-2 pints of water before sleeping. You might piss yourself during the night but that's just a chance i'm willing to take!