Schizophrenia is really symptom's of something going on at a smaller level. 
 http://www.iflscience.com/brain/scientists-closer-ever-discovering-cause-schizophrenia 
 So the schizophrenia being treated is more then likely being covered up and in the long run having too many connections in the brain may lead to faster aging and dementia/alzheimers which is largely ignored in favor of the "rotten brain" imagery Pharma produces