RT Journal Article SR Electronic T1 No difference in moxifloxacin penetration between infected and uninfected pleural fluid JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P4374 VO 42 IS Suppl 57 A1 Kalliopi Chatzika A1 Katerina Manika A1 Paschalina Kontou A1 Georgia Pitsiou A1 Konstantinos Zarogoulidis A1 Ioannis Kioumis YR 2013 UL http://erj.ersjournals.com/content/42/Suppl_57/P4374.abstract AB Introduction: Moxifloxacin (MXF) is often prescribed for the treatment of pleural space infections. However, there are no existing data on MXF penetration into pleural fluid (PF) in humans.Aims: To compare the kinetics and penetration of MXF in patients with infected and uninfected pleural effusion.Methods: Nine patients with infected effusion (51.8±19.3 years) and ten patients with uninfected effusion (70.9±11.8 years) enrolled the study. All patients received a single intravenous dose of 400 mg MXF. Serial plasma (PL) and PF samples were collected for a 24 hour interval. MXF concentration in PL and PF was determined by high-performance liquid chromatography. The maximum concentration (CmaxPF) was estimated by direct observation of determined values and TmaxPF was the time to reach that concentration. The area under concentration-time curve (AUC24PL and AUC24PF) was calculated by the trapezoidal rule.Results:View this table:No statistically significant differences were observed between two groups in PF Cmax, AUC24 and MXF penetration. The time to reach maximum concentration of MXF in PF was statistically significantly longer in patients with infected effusion.Conclusions: These data demonstrate an equal MXF penetration in both groups and also a remarkable delay in achievement of PF Cmax in patients with pleural space infection.The presence of infection did not affect the degree of MXF penetration and the on-site drug exposure as expressed by the AUC24PF.