PK Analysis of Moxifloxacin in the Treatment of CAP

Status Completed

Clinical Trial Summary

At the Department of Infectious Diseases, Aarhus Denmark, moxifloxacin is used in the empirical treatment of severe community-acquired pneumonia (CAP). This study was designed to determine the pharmacokinetics of moxifloxacin 400 mg/day to patients treated empirically for CAP. To accomplish this aim, we established a pharmacokinetic population model. This approach was adopted with the dual purpose of assessing the potential efficacy of the drug and performing Monte-Carlo simulations to characterize the maximal MICs for which recommended pharmacokinetic-pharmacodynamic (PK-PD) targets are obtained for pathogens commonly known to cause CAP.

Clinical Trial Description

We determined the pharmacokinetic profile of moxifloxacin 400 mg/day in 18 patients treated empirically for community-acquired pneumonia. . Moxifloxacin plasma concentrations were determined the day after therapy initiation using ultra high performance liquid chromatography. The moxifloxacin plasma concentration-time profiles were described with a one compartment model, using NONMEM. Peak drug concentrations (Cmax) and 24-hour area under the free drug concentration-time curve values (fAUC0-24) predicted for each patient were evaluated against epidemiological cut-off MIC values for Streptococcus pneumoniae, Haemophilus influenzae and Legionella pneumophilia. PK-PD targets adopted were Cmax/MIC ≥ 12.2 for all pathogens, fAUC0-24/MIC > 34 for S. pneumoniae and fAUC0-24/MIC > 75 for H. influenzae and L. pneumophilia. The same PK-PD estimates were used in the simulations of probability of target attainment (PTA) versus MIC. ;

Study Design

Observational Model: Case-Only, Time Perspective: Cross-Sectional

Related Conditions & MeSH terms

Pneumonia

Clinical Trial Details

NCT number	NCT01983839
Study type	Observational
Source	University of Aarhus
Contact
Status	Completed
Phase	N/A
Start date	April 2013
Completion date	October 2014

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