4.2 Article

Is spontaneous reporting always the most important information supporting drug withdrawals for pharmacovigilance reasons in France?

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PHARMACOEPIDEMIOLOGY AND DRUG SAFETY
卷 21, 期 12, 页码 1289-1294

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WILEY PERIODICALS, INC
DOI: 10.1002/pds.3333

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pharmacoepidemiology; pharmacovigilance; adverse drug reaction; drug withdrawal

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Purpose The objective of our study was to determine the nature of scientific evidence leading to drug withdrawal for safety reasons in France (between 2005 and 2011). Methods Drugs (i.e., active ingredients) withdrawn were identified from the Web site of the French Health Products Agency. Additional information allowed us to classify these withdrawals according to the nature of evidence as clinical trials (CT), case reports/case series (CR/CS), casecontrol studies (CC), cohort, animal, or observational studies. Results A total of 22 active ingredients were withdrawn from the French market between 2005 and 2011. The nature and type of adverse drug reactions (ADRs) leading more frequently to drug withdrawal were cardiovascular (10-fold), neurological (5-fold), or hepatic, cutaneous, or psychiatric (3-fold each) ADRs. CR (19/22; 86.4%) and CT (13/22; 59.1%) were the most frequently involved methods. In 5 of 22 (23%) cases, CR were the sole evidence. However, 68% (15/22) of regulatory decisions were based on multiple sources of evidence: For example, data from CR?+?CT were used in eight cases. CC or cohort studies were used in only five cases. Conclusion This study underlines that spontaneous reporting remained the most important source of drug withdrawals between 2005 and 2011. However, its relative importance decreased in comparison with that in 19972004. The importance of pharmacoepidemiological methods slightly increased but remained low. Finally, regulatory authorities seem to have more frequently based their safety decisions on multiple sources of evidence than before. Copyright (c) 2012 John Wiley & Sons, Ltd.

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