Replies to 'Bipolar Disorder'

But there isn't a whole lot you can do. He is an adult who has refused to take his medication. Unless he is a danger to himself or others (in which case he can be committed to a mental hospital) there is nothing you or anyone else can do except to try to encourage him to take his medication.

If he is refusing to contact you I don't see that you have very many options. You could hire a private detective to find him and check on him, but, again, you can't force him to do anything unless he is in danger or is dangerous to someone else. You can just hope.