[Iatrogenic disease. Prospective study, relation to drug consumption]

The role of drug use in iatrogenic pathology was studied prospectively in a hospital department. It wa s found that patients received an average of 2.8 drugs and that 30% of the prescriptions were unnecessary. During this six-month study of all patients admitted to a general medicine and rheumatology department, there were 67 iatrogenic accidents affecting 12.3% of the population: 41.8% of the accidents were directly responsible for hospitalization, 35.4% were due to therapy initiated during hospitalization and 32.8% occurred during the hospital stay but were the result of earlier treatment. Moreover, 26% of the accidents were related to what was considered to be unnecessary therapeutics. This study shows that elevated iatrogenic pathology was due to excessive drug use. However, the degree of severity of the adverse effects varied considerably, and some could have been easily avoided.