Sex Differences in Adverse Drug Reactions of Metformin: A Longitudinal Survey Study

Sieta T. Vries, Petra Denig, Corine Ekhart, Peter G. M. Mol and Eugene P. Puijenbroek ()
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Sieta T. Vries: University of Groningen, University Medical Center Groningen
Petra Denig: University of Groningen, University Medical Center Groningen
Corine Ekhart: Netherlands Pharmacovigilance Center Lareb
Peter G. M. Mol: University of Groningen, University Medical Center Groningen
Eugene P. Puijenbroek: Netherlands Pharmacovigilance Center Lareb

Drug Safety, 2020, vol. 43, issue 5, No 9, 489-495

Abstract: Abstract Introduction In general, women more often experience metformin-associated adverse drug reactions (ADRs) than men. Objectives We aimed to assess whether sex differences in reported ADRs for metformin are observed at different times after initiation, and to explore their concurrence with sex differences in the dose of metformin over time. This may guide future studies in assessing the involved mechanisms of sex differences in metformin-associated ADRs and may guide sex-specific management of ADRs in clinical practice. Methods This study has a longitudinal design using data about patients initiating metformin collected by the Dutch National Pharmacovigilance Center Lareb through their Intensive Monitoring program. Patients were asked to complete a web-based questionnaire six times after initiation (i.e., at 2 weeks, 6 weeks and at 3, 6, 9, and 12 months). The outcome variables were the proportion of patients reporting any ADR (primary) and the dose of metformin (secondary). Sex differences in the proportions of ADRs and in the dose were tested at each assessment using Pearson Chi-Squared tests and Wilcoxon rank-sum tests, respectively. Using Bonferroni adjustment for multiple testing, a p value

Date: 2020
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DOI: 10.1007/s40264-020-00913-8

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