Medical psychology or medico-psychology is the application of psychological principles to the practice of medicine, primarily drug-oriented, for both physical and mental disorders.
A medical psychologist who holds prescriptive authority for specific psychiatric medications and other pharmaceutical drugs must first obtain specific qualifications in psychopharmacology. A trained medical psychologist, or clinical psychopharmacologist who has prescriptive authority, is equated with a mid-level provider who has the authority to prescribe psychotropic medication such as antidepressants for mental health disorders. However, a medical psychologist does not automatically equate with a psychologist who has the authority to prescribe medication. In fact, most medical psychologists do not prescribe medication and do not have the authority to do so.
Medical psychologists apply psychological theories, scientific psychological findings, and techniques of psychotherapy, behavior modification, cognitive, interpersonal, family, and lifestyle therapy to improve the psychological and physical health of the patient. Psychologists with postdoctoral specialty training as medical psychologists are the practitioners with refined skills in clinical psychology, health psychology, behavioral medicine, psychopharmacology, and medical science. Highly qualified and postgraduate specialized doctors are trained for service in primary care centers, hospitals, residential care centers, and long-term care facilities and in multidisciplinary collaboration and team treatment.
The field of medical psychology may include predoctoral training in the disciplines of health psychology, rehabilitation psychology, pediatric psychology, neuropsychology, and clinical psychopharmacology, as well as subspecialties in pain management, primary care psychology, and hospital-based (or medical school-based) psychology as the foundation psychological training to qualify for proceeding to required postdoctoral specialty training to qualify to become a diplomate/specialist in medical psychology.