Schizoaffective disorder is a psychotic disease with schizophrenic and affective i.e. depressive and/or manic symptoms. The disease can result in different patient outcomes depending upon the treatment applied. Patients suffering from the disease have in increased vulnerability towards stress and need an appropriate prophylactic medication so that they can perform social and maybe professional activities. Classical Neurotransmitters and Neuropeptides involved in Schizoaffective Disorder is a brief monograph that gives readers an overview of frequent psychotic diseases affecting patients. The contents of the monograph include details about biochemical alterations of classical neurotransmitters and neuropeptides in specific regions of the human brain, the susceptible genes and cellular mechanisms behind schizoaffective disorder, the neural networks of schizoaffective disorder and prophylactic pharmacotherapies administered to patients. Three case reports which demonstrate the alterations of classical neurotransmitters and neuropeptides in the brain are also presented. This monograph is a useful guide for medical residents and clinicians in training who wish to understand the basics about treating patients suffering from schizoaffective disorder.