My brother (23) was diagnosed with Bipolar 1 when he was 16 and it has been one hell of a roller coaster ride. He has been on a consistent cycle for almost a decade which follows as: Manic state, leading into psychosis, sometimes catatonic states, resulting in a hospital/ER admission. After stabilizing him at the hospital, he is transferred to a mental hospital for a few days/weeks. His states of mania and psychosis tend to fade away after a few weeks, and they release him. He is also an addict and uses drugs as a coping mechanism which triggers his mania. He does well on medication, but after awhile he feels "normal" and stops taking it which results in another manic episode, restarting the cycle. It's challenging on my family who have watched my brother go through periods of doing well (medicated) to an aggressive manic/psychosis state (verbally/emotionally/physically abusive) once he stops medication and begins to self medicate with drugs. He has gone through six drug rehabilitation treatment facilities, all of which he usually ends up checking himself out of the program early. My parents are at the point where they just don't know what to do anymore, he is unable to hold a job, properly take care of himself, and he refuses treatment for his mental health and addictions. My parents don't want him to end up homeless but his behavior from his manic episodes are closing more doors of housing options for him. He unfortunately, has burned a lot of bridges and I have had to set firm boundaries with him to protect myself. 

My questions are: 

1. How do you approach a situation with someone with Bipolar 1 who refuses treatment? 
2. How do you emotionally deal with someone having a manic episode and the aftermath of one.
3. If you suffer with bipolar 1, how has family/friends supported you in a way that was the most helpful?