Classification of ADRs: a proposal for harmonization and differentiation based on the experience of the Comprehensive Hospital Drug Monitoring Bern/St. Gallen, 1974-1993.

The present paper deals with the classification of adverse drug reactions (ADRs) according to today's largely accepted pathomechanisms. The classification system applied, relies primarily on the proposals of Rawlins and Thomson with type A ('augmented') and B ('bizarre') reactions. In the database of the Comprehensive Hospital Drug Monitoring (CHDM) Bern/St.