The book highlights the tasks and features of medical care, observation and care for patients with mental disabilities. The presentation of these questions relies on the description of the main sections of general and private psychiatry, as well as psychohygiene, psychoprophylaxis and the organization of psychiatric care. The responsibilities of paramedical personnel in the field of preventive, curative and rehabilitation measures carried out in out-of-hospital and hospital psychiatric and narcological institutions are comprehensively considered. Special attention is paid to the role of the nurse in the conduct of labor, military and forensic psychiatric examinations. Brief information is provided on the history of the development of psychiatry and on the legal issues of work in psychiatric institutions. A significant place is given to the description of mental reactions and mental disorders, often developing in patients with somatic diseases, and the associated features of work in general medical institutions. The publication is intended for students. medical schools, nurses of medical institutions and ambulances.