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Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Drug+Saf 2020 ; 43 (7): 657-660 Nephropedia Template TP
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A New Drug-Drug Interaction Between Hydroxychloroquine and Metformin? A Signal Detection Study #MMPMID32495148
Montastruc JL; Toutain PL
Drug Saf 2020[Jul]; 43 (7): 657-660 PMID32495148show ga
INTRODUCTION: Hydroxychloroquine was recently promoted in patients infected with COVID-19 infection. A recent experimental study has suggested an increased toxicity of hydroxychloroquine in association with metformin in mice. OBJECTIVE: The present study was undertaken to investigate the reality of this putative drug-drug interaction between hydroxychloroquine and metformin using pharmacovigilance data. METHODS: Using VigiBase((R)), the WHO pharmacovigilance database, we performed a disproportionality analysis (case/non-case study). Cases were reports of fatal outcomes with the drugs of interest and non-cases were all other reports for these drugs registered between 1 January 2000 and 31 December 2019. Data with hydroxychloroquine (or metformin) alone were compared with the association hydroxychloroquine + metformin. Results are reported as ROR (reporting odds ratio) with their 95% confidence interval. RESULTS: Of the 10,771 Individual Case Safety Reports (ICSR) involving hydroxychloroquine, 52 were recorded as 'fatal outcomes'. In comparison with hydroxychloroquine alone, hydroxychloroquine + metformin was associated with an ROR value of 57.7 (23.9-139.3). In comparison with metformin alone, hydroxychloroquine + metformin was associated with an ROR value of 6.0 (2.6-13.8). CONCLUSION: Our study identified a signal for the association hydroxychloroquine + metformin that appears to be more at risk of fatal outcomes (particularly by completed suicides) than one of the two drugs when given alone.