alexa Case series of liver failure associated with rosiglitazone and pioglitazone.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular and Genetic Medicine

Author(s): Floyd JS, Barbehenn E, Lurie P, Wolfe SM

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Abstract PURPOSE: The thiazolidinedione drugs rosiglitazone and pioglitazone are not widely known to be hepatotoxic. We evaluated the FDA Adverse Event Reporting System (AERS) to determine the number of reported cases of liver failure associated with rosiglitazone and pioglitazone between 1997 and 2006, and described their clinical characteristics. METHODS: Adverse event reports spontaneously submitted to the FDA AERS from 1997 to 2006 were examined. Liver failure associated with rosiglitazone or pioglitazone was defined as liver injury accompanied by hepatic encephalopathy, liver transplantation, placement on a liver transplant list, or death in which all other likely etiologies were excluded. Using prescribing data, the number of reported cases of liver failure per million patient-years of exposure was calculated for each drug. RESULTS: Twenty-one cases met our case definition. Clinical characteristics, outcomes, and pathologic data were similar between cases of liver failure associated with rosiglitazone and with pioglitazone. The median duration of therapy was 9 weeks and 85\% of cases were acute, defined as symptom onset to liver failure in less than 26 weeks. The case-fatality rate was 81\% (17/21), and only 14\% (3/21) spontaneously recovered. Accounting for underreporting, the number needed to harm (NNH) for each case of liver failure was 44 000 patient-years of exposure for rosiglitazone and 52 000 patient-years of exposure for pioglitazone. CONCLUSIONS: This is the largest case series of liver failure associated with rosiglitazone or pioglitazone reported to date, strengthening the evidence that these drugs can cause severe hepatotoxicity. Copyright (c) 2009 John Wiley & Sons, Ltd. This article was published in Pharmacoepidemiol Drug Saf and referenced in Journal of Molecular and Genetic Medicine

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