A comparison of three different sources of data in assessing the frequencies of adverse reactions to amiodarone

Loke, Yoon K., Derry, Sheena and Aronson, Jeffrey K. (2004) A comparison of three different sources of data in assessing the frequencies of adverse reactions to amiodarone. British Journal of Clinical Pharmacology, 57 (5). pp. 616-621. ISSN 1365-2125

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Abstract

Aims: To compare the frequencies of adverse drug reactions (ADRs) to amiodarone from three separate datasets: (i) a meta-analysis of clinical trials, (ii) spontaneous reports published in medical journals, and (iii) spontaneous reports sent to the World Health Organization (WHO). Methods: We classified the ADRs into eight categories, based on the site involved, and built a rank order of the ADRs by category (from most to least commonly reported) for each dataset. We also calculated the relative proportions for all eight ADR categories within each dataset, in order to be able to compare the distributions of ADR frequencies: we assigned an index value of 1.0 to the frequency of respiratory toxicity in each set and calculated values for the other ADRs relative to respiratory toxicity. Results: Thyroid disorders were the most commonly reported ADRs in the WHO dataset. In contrast, published case reports showed a preponderance of respiratory disorders, while in the meta-analysis cardiac conduction problems were the most frequent. The rank orders of ADRs differed among the three datasets, as did the index values of specific ADR categories with respect to the respiratory category. Conclusions: The distributions of ADR rank order and relative frequencies are dissimilar among the three datasets, as each dataset compiles information in a different way. Nevertheless, each dataset has its own specific strengths, and all three should be used together in obtaining a complete picture of a drug's safety profile. Important therapeutic and regulatory decisions should not simply be based on one source of data.

Item Type:	Article
Faculty \ School:	Faculty of Medicine and Health Sciences > Norwich Medical School
UEA Research Groups:	Faculty of Science > Research Groups > Norwich Epidemiology Centre Faculty of Medicine and Health Sciences > Research Groups > Norwich Epidemiology Centre Faculty of Medicine and Health Sciences > Research Groups > Health Services and Primary Care
Depositing User:	EPrints Services
Date Deposited:	25 Nov 2010 11:10
Last Modified:	17 Apr 2023 23:50
URI:	https://ueaeprints.uea.ac.uk/id/eprint/13160
DOI:	10.1111/j.0306-5251.2003.02055.x

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