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Mortality rate in so-called "metformin-associated lactic acidosis": a review of the data since the 1960s.
MedLine Citation:
PMID:  25079826     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
AIMS: The aim of this study is to study the mortality rate in so-called "metformin-associated lactic acidosis" (MALA) from the 1960s to date and to establish whether the rate has changed over time.
RESEARCH DESIGN AND METHODS: We systematically searched two data sources for information on mortality in cases recorded as MALA: (i) series in the scientific literature containing over 20 case reports and (ii) a large pharmacovigilance database (containing 869 reports logged between 1995 and 2010).
RESULTS: We identified 12 series published between the 1960s and 2013 (mean ± SD [range] number of case reports per series: 51.4 ± 24.7) [23-110]) and 722 case reports with a specified outcome in the pharmacovigilance database. None of the sources specified all three criteria for determining MALA (i.e., the pH level, blood lactate concentration, and blood metformin concentration). The mortality rate in the literature series ranged from 3% to 61%. The value was 47% in the earliest series (1960-1993) and below 25% in the last series. The mean pH per literature series varied widely (from 6.89 to 7.20). The mortality rates in the pharmacovigilance database fell from around 50% to 25% over the study period, while the pH remained in a narrow range (6.94-7.07).
CONCLUSIONS: The overall mortality rate for MALA was around 50% during the period 1960-2000 but has since fallen to around 25%. Copyright © 2014 John Wiley & Sons, Ltd.
Authors:
Farshad Kajbaf; Jean-Daniel Lalau
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-31
Journal Detail:
Title:  Pharmacoepidemiology and drug safety     Volume:  -     ISSN:  1099-1557     ISO Abbreviation:  Pharmacoepidemiol Drug Saf     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-7-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9208369     Medline TA:  Pharmacoepidemiol Drug Saf     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 John Wiley & Sons, Ltd.
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