The history of the Drug Utilization Research Group in Europe

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Abstract
Following the recommendations from a World Health Organization (WHO)/Euro symposium Consumption of drugs in 1969, a common classification system for drugs was developed, the Anatomical Therapeutic Chemical (ATC), and a technical unit of comparison, the Defined Daily Dose (DDD), as a comparative unit of drug use. This was found to be robust across therapeutic classifications, dosing forms and diverse populations. To maintain and develop the ATC/DDD system a WHO‐Collaborating Centre was established in Oslo. As this was found to be of global interest the centre now reports to the WHO headquarters in Geneva.An informal WHO Drug Utilization Research Group (WHO‐DURG), later the EuroDURG, has by now met 28 times in Europe. Since 1994 in Stockholm all these meetings have been with ISPE (International Society for Pharmacoepidemiology) when meeting in Europe.The main focus was initially to improve drug utilization through cross‐national drug utilization studies based on the ATC/DDD methodology as they revealed large differences between and within countries that could not easily be explained by morbidity differences alone. These observed differences have led to the expansion of the area to include social, economic and qualitative methods with a more generalized public health focus. One of the most recent contributions was the development of drug use quality indicators. Copyright © 2005 John Wiley & Sons, Ltd.