Marijuana is all thats used, but music talks about a plethora of other drugs and intoxicants and a couple others are discussed in bits and pieces through the show
I'm counting lots of bile coming out mouth as v* because when this happened to me in hospital a few years ago they put it in my notes as "v* bile" and kept me in for an extra day to make sure I was ok to go home. As an emetophobic this would also look and sound like v*
SPOILERS: A character is shown in flashbacks to have previously been in a mental hospital, and it is revealed that he has committed several violent acts