That is interesting @saho. Don't forget the fact that serotonin might be causing schizophrenia also. Some atypical antipsychotic which are prescribed to a patient with schizophrenia has successfully treated them up to the point of remission.

GABA is another important neurotransmitter which has been linked to the psychopathology of schizophrenia. GABA helps controlling dopamine level and in a patient with schizophrenia, the concentration of GABA was found to be low. Great article.