Do vitamins help the negative and cognative symptoms of schizophrenia if so which ones?

I already take wellbutran<antidepressant>and seraqual<antiphycotic> I’m not even sure if i am suffering from the negative symptoms or if this is just how i am now. I used to be a very social and out going person that was pretty much up for anything. Now i sit at home pretty much all day. http://bit.ly/nwNSVS