Is it possible for me to get a guardianship or temporary guardianship for my brother who suffers from schizophrenia?

My brother had been stabilized on medication for many years until recently when his doctor caused him to have a psychotic break by seriously cutting back one of his necessary medications. He had a bad withdrawal in really bad shape for months and just finally managed to get him hospitalized, but not before he ruined his life, lost his vehicle is being evicted from his subsidized housing of 17 years, and much more. I have been desperately trying to help him from out of state but no one will talk to me because of HIPAA laws and he is way too ill right now to give permission. He has no one else in the world and the system has seriously let him down. I think perhaps a temporary guardianship would be enough for me to make sure he gets the medication and recovery he needs, and to fight his eviction. He desperately needs an advocate and my hands are tied by privacy laws right now. It's urgent because they won't keep him long enough in the hospital to recover., and this will repeat.