WEll if you can meet with his therapist that would be great to have a mediator.
It can take a long time to get his meds straightened out...this is frustrating. but his meds are a big big part of the solution.
For some people the meds don't work at all...which can be devastating in and of itself.

I don't know what he is on or what he has tried..do you?
I would be more than happy to talk about specific medications if you want.
Just to be clear....I am not a mental health professional.
If you show consern for him than how can you get into trouble?
It all boils down to how you approach the issue.
He needs to trust you.
keep posting...this is a good place to vent too.
bizi