NDLI: Pharmacokinetic-pharmacodynamic analysis to evaluate the effect of moxifloxacin on QT interval prolongation in healthy Korean male subjects

Content Provider	PubMed Central
Author	Hong, Taegon Han, Seunghoon Lee, Jongtae Jeon, Sangil Park, Gab-jin Park, Wan-su Lim, Kyoung Soo Chung, Jae-yong Yu, Kyung-sang Yim, Dong-seok
Copyright Year	2015
Abstract	A single 400 mg dose of moxifloxacin has been the standard positive control for thorough QT (TQT) studies. However, it is not clearly known whether a 400 mg dose is also applicable to TQT studies in Asian subjects, including Koreans. Thus, we aimed to develop a pharmacokinetic (PK)-pharmacodynamic (PD) model for moxifloxacin, to evaluate the time course of its effect on QT intervals in Koreans. Data from three TQT studies of 33 healthy male Korean subjects who received 400 and 800 mg of moxifloxacin and placebo (water) were used. Twelve-lead electrocardiograms were taken for 2 consecutive days: 1 day to record diurnal changes and the next day to record moxifloxacin or placebo effects. Peripheral blood samples were also obtained for PK analysis. The PK-PD data obtained were analyzed using a nonlinear mixed-effects method (NONMEM ver. 7.2). A two-compartment linear model with first-order absorption provided the best description of moxifloxacin PK. Individualized QT interval correction, by heart rate, was performed by a power model, and the circadian variation of QT intervals was described by two mixed-effect cosine functions. The effect of moxifloxacin on QT interval prolongation was well explained by the nonlinear dose-response (Emax) model, and the effect by 800 mg was only slightly greater than that of 400 mg. Although Koreans appeared to be more sensitive to moxifloxacin-induced QT prolongation than were Caucasians, the PK-PD model developed suggests that a 400 mg dose of moxifloxacin is also applicable to QT studies in Korean subjects.
Related Links	http://dx.doi.org/10.2147/dddt.s79772
Ending Page	1245
Starting Page	1233
File Format	PDF
ISSN	11778881
e-ISSN	11778881
Journal	Drug Design, Development and Therapy
Volume Number	9
Language	English
Publisher	Dove Medical Press
Publisher Date	2015-02-01
Access Restriction	Open
Rights Holder	Dove Medical Press
Subject Keyword	Pharmacology Drug Discovery Pharmaceutical Science Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Drug Discovery Pharmacology Pharmaceutical Science

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