This document provides an overview of psychopharmacology and the use of psychotropic drugs to treat various psychiatric disorders. It discusses the main drug classes used including antipsychotics, antianxiety drugs, antidepressants, and mood stabilizers. It focuses on the treatment of psychosis, schizophrenia, and affective or mood disorders. The document outlines the neurological mechanisms and side effects of typical and atypical antipsychotic drugs, especially their effects on dopamine and serotonin transmission in the brain.