I haven't read all the others comments yet. I had to respond NOW. This makes me so angry. Your brother sounds just like my ex-husband! He would tell me the EXACT same thing. He said that people don't need to have these drugs, that it's mind over matter, that I was weak. He would tell me to just "get over it". His mother also had some similar problems and he would refuse to talk to her or visit for extended periods of time. I would get so angry. Who do these people think they are? I really don't understand. Until you walk a mile in my shoes keep your mouth shut. It is a proven fact that these things we all go through are real. They are chemical imbalances. I'm going to school in the medical field and I know this to be true. It's scientific fact. If others choose to ignore this, that's their problem, not ours.
I'm done being on my soap box. Sorry. I really and truely hope that your brother will do some research and come around, for your sake as well as for his. You need each other. Family is supposed to be a support system. Family is important, one of the most important things here on this earth.
As for my ex-husband, this is a part of the reason he's now my ex. May he rot in h***.