Abstract
The method used in France since 1977 for assessing adverse drug reaction (ADRs) is based on a three-stage process: assessment of three chronological criteria (challenge, dechallenge, and rechallenge); assessment of clinical and biological findings; and a combination of chronological and symptomatological assessments to obtain a 3-degree global score (1: doubtful, 2: possible, 3: probable). Bibliographical data (previously reported or unreported ADR) are assessed quite separately; thus, the method has a good sensitivity for detecting new ADRs.
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