Impact of Covid-19 Vaccination on Spontaneous Pharmacovigilance Reporting in France

Sibylle Germay (), Allison Singier, Francesco Salvo and Antoine Pariente
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Sibylle Germay: University of Bordeaux
Allison Singier: University of Bordeaux
Francesco Salvo: University of Bordeaux
Antoine Pariente: University of Bordeaux

Drug Safety, 2023, vol. 46, issue 12, No 9, 1389 pages

Abstract: Abstract Introduction In 2021, the massive Covid-19 vaccination campaign in France was accompanied by an intensified pharmacovigilance monitoring of their potential adverse drug reactions. The importance of this reporting might have led to an important selective reporting and overloading of Pharmacovigilance Centres, delaying the recording of some reports in the national pharmacovigilance database. In this context, we aimed to evaluate the impact of the Covid-19 vaccination campaign in France and related reports on spontaneous reporting of adverse drug reactions that were not related to the Covid-19 vaccine. Methods We performed time-series analyses considering the monthly number of adverse drug reactions reported between January 1, 2018 and April 30, 2022 using the French Pharmacovigilance database. The impact of the Covid-19 vaccination campaign on the monthly reporting not Covid-19 vaccine related was estimated using interrupted time-series. January 2021, marking the start of the campaign, was the intervention date in the models. Analyses were run globally first considering all adverse drug reaction reports, and second according to notifier type and to case seriousness. Results We included 170,294 reports registered in the French Pharmacovigilance database between January 1, 2018 and April 30, 2022 that were not Covid-19 vaccine-related. Among these, 77,067 (45.3%) were serious and 146,683 (86.1%) had been reported by health care professionals. The campaign start was associated with a nearly 35.0% decrease in average monthly reporting that was not Covid-19 vaccine-related, with a significant level decrease in the monthly number of reports of −658.0 (p

Date: 2023
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DOI: 10.1007/s40264-023-01359-4

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