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- W2765300930 abstract "BackgroundMethicillin-resistant Staphylococcus aureus (MRSA) is a prevalent pathogen in patients with cystic fibrosis (CF) associated with increased morbidity. Ceftaroline fosamil is an intravenous (IV) cephalosporin with activity against MRSA. There are minimal data regarding dosing in the CF population. The objective of this study was to determine the pharmacokinetic and pharmacodynamic profile of IV ceftaroline in patients with CF.MethodsWe conducted a single-center prospective study of children and young adults with CF receiving ceftaroline (15 mg/kg IV up to 600 mg every 8 h) as part of treatment for a CF pulmonary exacerbation between June 2016 and April 2017. Seven patients were enrolled for a total of 10 treatment courses. For each treatment course, up to 8 plasma samples were assayed for ceftaroline using ultra-high performance liquid chromatography with mass spectrometry. Maximum plasma concentration, systemic clearance, and elimination half-life were calculated. The area under the curve (AUC) above the minimum inhibitory concentration (MIC) and the percent time above the MIC (%fT > MIC) were determined for each subject using MICs of 0.5, 1, and 2 μg/mL and the measured MIC if available.ResultsThe mean (SD) age for the 7 patients was 20.3 (8.0) years. Mean (SD) maximum plasma concentration of ceftaroline was 22.7 (9.6) μg/mL, systemic clearance 7.9 (3.3) L/h, and half-life 1.1 (0.4) hours. Using a MIC of 1 μg/mL, accepted as the MIC 90 of MRSA isolates, AUC above MIC mean (SD) was 53.6 (19.5) μg·h/mL, mean (SD) %fT > MIC was 75.7 (10.4), and all subjects had >60%fT > MIC.ConclusionsIn this cohort of CF patients, mean ceftaroline half-life was 1.1 h, which is notably lower than the general population. The dosing regimen studied, which exceeds the recommended dosing in the non-CF population, was adequate to achieve >60% time above the MIC in all patients." @default.
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- W2765300930 date "2018-05-01" @default.
- W2765300930 modified "2023-10-18" @default.
- W2765300930 title "Ceftaroline pharmacokinetics and pharmacodynamics in patients with cystic fibrosis" @default.
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- W2765300930 doi "https://doi.org/10.1016/j.jcf.2017.10.010" @default.
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