On a personal level, I disagree with ECT. Its just something that is personal to me but I can accept that other people (including health professionals) use it quite openly. Has your brother tried other forms of therapy? (Such as Cognitive behavioural Therapy - CBT). Personally I would change your doctor, as I agree that he doesnt sound like he is too sure about what he is doing. An observation at a hospital is a great idea as it gives them a much clearer picture on your brothers condition. At present, I would change doctors and push for the observation. Hopefully the observation will lead to someone knowing which med to use.
I hope this helps
This is Kitt. I would strongly suggest you find a psychiatrist that is willing to work with your brother instead of one who says I don't know what else to do?
I also think inpatient in the right facility would be a plus for your brother. Make sure he is in a program where he is not left sitting in a room all day and just receives his meds from the staff.
I admire your advocating for your brother...............you are truly a loving person.
IMHO your on the right road to helping him.