Medical psychology is the application of psychological principles to the practice of medicine, and is clearly comprehensive rather than primarily drug-oriented, for both physical and mental disorders. The specialty of Medical Psychology has been instrumental in advocacy and professional publications in increasing the awareness of Governmental Agencies, Scientific Societies, and the World Health Associations about the limited effect of "medication only approaches" to mental disorders and many related chronic physical disorders. Medical psychologists and some psychopharmacologists are trained and equipped to modify physical disease states and the actual cytoarchitecture and functioning of the central nervous and related systems using psychological and pharmacological techniques, and to provide prevention for the progression of disease having to do with poor personal and life-style choices and conceptualization, behavioral patterns, and chronic exposure to the effects of negative thinking, choosing, attitudes, and negative contexts (from wikipedia).