Abstract
Background
Several studies suggest a significant risk of hospitalization because of drug–drug interactions in the general population. However, to our knowledge, this risk has never been measured precisely in a large population.
Objective
We aimed to estimate the risk of emergency hospitalization associated with exposure to the contraindicated concomitant use of interacting drugs in the general population.
Methods
A self-controlled case-series analysis was carried out on a cohort of 150,000 subjects randomly selected from the French national health insurance database, between 01/01/2016 and 31/12/2016. Exposure to the contraindicated concomitant use of interacting drugs was defined as the overlapping period of dispensings of drugs contraindicated because of clinically meaningful drug–drug interactions. The main outcome, incidence rate ratios, comparing the incidence rate of emergency hospitalizations during each category of exposure time periods with that during the reference period, was estimated using the conditional Poisson regression model.
Results
Over the study period, 967 subjects were exposed to at least one contraindicated concomitant use of interacting drug and 177 had been exposed and presented at least one emergency hospitalization. Compared to the unexposed follow-up time, the risk of emergency hospitalization increased during exposure to contraindicated concomitant use of interacting drug periods (incidence rate ratio: 2.41; 95% confidence interval 1.55–3.76). This could translate into 7200 (4500–8900) potentially preventable emergency hospitalizations yearly in France.
Conclusions
We evidenced an almost 2.5-fold increase in the risk of emergency hospitalizations during periods of exposure to contraindicated concomitant use of interacting drugs, with a potential public health impact exceeding 7000 preventable hospitalizations yearly in France. These results confirm the need to reinforce training in prescription practices and tools for prevention concerning contraindicated concomitant use of interacting drugs. These would especially concern drugs involved in an increase in long QT syndrome when associated such as citalopram, and highly prescribed drugs with a risk of overdose if co-prescribed with cytochrome P450 inhibitors, such as antigout and lipid-lowering drugs.
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The present study is part of the Drugs Systematized Assessment in real-liFe Environment (DRUGS-SAFE) research program that is funded in part by the French Medicines Agency (Agence Nationale de Sécurité du Médicament et des Produits de Santé, ANSM); grant number 2014s029. This program aims at creating an integrated system for the concomitant monitoring of drug use and safety in France. The potential impact of drugs, the frailty of populations, and the seriousness of risks drive the research program. The funder had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and the decision to submit the manuscript for publication. This publication represents the views of the authors and does not necessarily represent the opinion of the French Medicines Agency.
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All authors declare research grants from the French Medicines Agency (Agence Nationale de Sécurité du Médicament et des Produits de Santé, ANSM).
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Publicly sharing EGB data is forbidden by law according to the French national data protection agency (Commission Nationale de l’Informatique et des LIbertés, CNIL); regulatory decisions AT/CPZ/SVT/JB/DP/CR05222O of 14 June, 2005 and DP/CR071761 of 28 August, 2007. To request data access, please contact The National Institute for Health Data (Institut National des Données de Santé, INDS; website: http://www.indsante.fr/).
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LL, JB, and AP contributed to the conception and design; AJ contributed to data acquisition; LL and AJ contributed to data analysis; LL, JB, AJ, and AP contributed to data interpretation; LL contributed to drafting of the article; JB, AJ, and AP critically revised the article for important intellectual content. All authors read and approved the final version of the article.
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Létinier, L., Bezin, J., Jarne, A. et al. Drug–Drug Interactions and the Risk of Emergency Hospitalizations: A Nationwide Population-Based Study. Drug Saf 46, 449–456 (2023). https://doi.org/10.1007/s40264-023-01283-7
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DOI: https://doi.org/10.1007/s40264-023-01283-7