Practitioners in psychology and related fields, such as psychiatry, pediatrics, and education, use two primary means of changing client behavior. The first is the use of enviromental manipulations to rearrane the reinforcers,stumulus control, and motivating operations that maintain specific behavior. The second is the use of psychotropic drugs to bring about change in behavior. Bothe approaches are used with a wide variety of clinical populations, indevelopmental disabilities, or schizophrenia. In this paper we focus on psuchotropic medications, the approach that is less familiar to behavior analysts, An extensive basic literature in behabioral