Prescribing in general practice and the provision of drug information.

Duplicate prescriptions were used to monitor patient prescribing and morbidity data for 20 Tayside general practitioners during a two-year study. Each participant took part in two periods of active monitoring separated by a three-month gap. Prescribing statistics collected during the first period of monitoring formed the basis of drug information which was circulated to participants shortly after the start of the second period. Some of this information was purely statistical; other information included comments as well as statistics. Subsequent monitoring assessed any changes in prescribing. The results indicate that drug information of this kind can influence general practitioner prescribing but that there were no differences in response to information which was purely statistical and information which included comments.