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- W1586974265 endingPage "48" @default.
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- W1586974265 abstract "Following reports of death from cardiac arrhythmias with drugs like terfenadine and cisapride, the International Conference for Harmonization formulated a guidance (E14) document. This specifies that all new drugs must undergo a ‘thorough QT/QTc’ (TQT) study to detect drug‐induced QT prolongation, a surrogate marker of ventricular tachycardia, especially torsades de pointes (TdPs). With better understanding of data from several completed TQT studies, regulatory requirements have undergone some changes since the E14 guidance was implemented in October 2005. This article reviews the implications of the E14 guidance and the changes in its interpretation including choice of baseline QT, demonstration of assay sensitivity, statistical analysis of the effect of new drug and positive control, and PK‐PD modelling. Some issues like use of automated QT measurements remain unresolved. Pharmaceutical companies too are modifying Phase 1 studies to detect QTc liability early in order to save time and resources. After the E14 guidance, development of several drugs that prolong QTc by >5 ms is being abandoned by sponsors. However, all drugs that prolong the QT interval do not increase risk of TdP. Researchers in regulatory agencies, academia and industry are working to find better biomarkers of drug‐induced TdP which could prevent many useful drugs from being prematurely abandoned. Drug‐induced TdP is a rare occurrence. With fewer drugs that prolong QT interval reaching the licensing stage, knowing which of these drugs are torsadogenic is proving to be elusive. Thus, paradoxically, the effectiveness of the E14 guidance itself has made prospective validation of new biomarkers difficult. This article is part of a themed section on QT safety. To view this issue visit http://www3.interscience.wiley.com/journal/121548564/issueyear?year=2010" @default.
- W1586974265 created "2016-06-24" @default.
- W1586974265 creator A5018298621 @default.
- W1586974265 creator A5061688322 @default.
- W1586974265 creator A5063503874 @default.
- W1586974265 creator A5066955105 @default.
- W1586974265 date "2010-01-01" @default.
- W1586974265 modified "2023-10-07" @default.
- W1586974265 title "Update on the evaluation of a new drug for effects on cardiac repolarization in humans: issues in early drug development" @default.
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