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J R Soc Med. Jun 1991; 84(6): 341–344.
PMCID: PMC1293280

Spontaneous adverse drug reaction reporting vs event monitoring: a comparison.

Abstract

Spontaneous adverse drug reaction (ADR) reporting is the mainstay of national and international drug safety evaluation in the post-approval phase. A major criticism of the method has been a high, but essentially unquantifiable, level of under-reporting by doctors. A direct comparison has been made between spontaneous ADR reporting and an observational event monitoring system for a group of more than 44,000 patients receiving one or other of a group of seven new drugs. The data suggests that under-reporting by the spontaneous system may be as high as 98% for several clinical events believed to be associated with drug treatment.

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Articles from Journal of the Royal Society of Medicine are provided here courtesy of Royal Society of Medicine Press