The book is based on the research work conducted by Dr Kulkarni. Psychoneuropharmacological research had received special attention during the past four decades, particularly after the discovery of psychotropic drugs, chlorpromazine and reserpine. These drugs had not only helped alleviate many mental disorders such as schizophrenia, anxiety and depression but had also helped neuroscientists to look deeply into the neurotransmitter based-pathophysiology of these disorders. Of the many neurotransmitters which were involved in the behavioural effects of drugs, gamma amino butyric acid (GABA) and dopamine had received a great attention. On the current concepts and developments in GABA receptor pharmacology and behavioural disorders and these articles were supported by selected publications from IJEB which were put in the form of book format for easy reference.