That movie is fucking weird, I watched it 2 times. The first time I remember being pretty fucked up on a few different drugs (can't remember which ones exactly) and I couldn't finish it. It made me way too uncomfortable, this was during the period of my life where I was smoking quite a bit of DMT and that movie gave me very dark vibes (weird because I never felt anything like that on DMT).
I decided to give it a second chance and watch it again on a long haul flight, I was able to enjoy it a bit more that time.
I may have to give it a third chance.
I think my favorite drug movie is fear and loathing in las vegas, it's the one I've watched the most at least.