One thing I haven't seen discussed is the possibility of him getting blackout drunk. He doesn't seem to appear hungover often, however with blood sugar and individual genetics the aftereffects really vary per person.
There are also ways to preempt a hangover (for instance by having an ibuprofen prior to drinking, which is an anti inflammatory that was kinda invented by accident by some scientist trying to stop a terrible hangover he had).
However, given the fact Phil starts the day with no food from what is known about him, I find it very unlikely that he's getting blackout drunk every night.
In any case Gin is such a weird drink to have. The hangovers from it are horrendous. It tastes like shit.
There's a lot of history from Gin:
https://en.wikipedia.org/wiki/Gin
https://munchies.vice.com/en_us/article/53jj7z/how-a-gin-craze-nearly-destroyed-18th-century-london
https://www.eater.com/drinks/2015/6...e-roots-of-why-some-fear-this-familiar-spirit
From what I know its a lot more popular in the UK and many non-US countries (correct me if I'm wrong) so I'd be interested to know why the fuck Phil picked up this particular spirit as his drink of choice.
Does Phil drink it neat or does he use any form of mixer? If he's drinking with tonic, then that stuff tastes like fucking ass and I'd be surprised if he can get properly shit canned that way.