Just jumping off your post..
Really we don't know that he was having trouble with his meds or that he even had mental health condition. Family could have thought it was medical problem when it was drugs or alcohol. Family could have known it was drugs or alcohol but wanted others to think it was mental health problem which would probably be more acceptable to most than drug or alcohol abuse.
I really wish we had the complete story instead of having to wait for it.
JMO
Totally agree. That or, taking meth etc on top of psychiatric drugs would probably create "problems". JMO.