It is quite easy to come off your meds suddenly (not as in, mentally). All it takes is you not sorting out the refills & you’re without.
Also, a lot of heavy recreational drugs can clash with common psychiatric medications - like for pretty much everything, there’s a reaction, ranging from either disabling both drugs to killing you. I know a lot of people that came off psychiatric medication in order to take drugs (usually stuff like heroin, coke, ecstasy)
They can often have negative side effects as well so people sometimes come off them (unwisely), but then suddenly stopping them can have really negative effects which would line up well with Shann’s switch
What am saying is I think it’s quite likely that Shann came off her meds suddenly as unfortunately there are shittonnes of opportunities for this to happen. Does anyone know what she was on?