A film about permatripping?

In case you don't know what a permatrip is...it's basically when someone uses a psychedelic drug and it ends up affecting them for life, and sometimes not in a positive way. I think this film accurately depicts what it would be like to be stuck inside a bad trip.

Personally speaking, I found this film difficult to watch. After experiencing a few bad trips in the past, this film woke me up to the idea of what it would probably be like to be trapped in a bad trip. For whatever reason, this film really struck a personal chord with me.