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  • Title: Population pharmacokinetics of meropenem in febrile neutropenic patients in Korea.
    Author: Lee DG, Choi SM, Shin WS, Lah HO, Yim DS.
    Journal: Int J Antimicrob Agents; 2006 Oct; 28(4):333-9. PubMed ID: 16942864.
    Abstract:
    Population pharmacokinetic parameters of meropenem in 57 febrile neutropenic patients and minimal inhibitory concentration (MIC) data for clinically isolated Pseudomonas aeruginosa and Escherichia coli were applied to estimate the time above the MIC (T>MIC) using the Monte Carlo simulation method. Mean population clearance (CL) and volume of distribution (V(d)) of meropenem were proportional to creatinine clearance (CL(Cr)) and body weight, respectively: CL (L/h)=9.7 x (CL(Cr)(mL/min)/120); V(d) (L)=14.6 x (body weight (kg)/61). In 1000 simulated patients treated with meropenem 0.5g or 1g every 8h, the proportions of patients who had a T>MIC less than 40% of the dosing interval were 46.3% and 39.5% for P. aeruginosa and 5.8% and 5.6% for E. coli, respectively. The overwhelming resistance of the pathogenic microorganisms, especially P. aeruginosa, in our data compared with that reported in North America suggests the importance of regions or countries as a critical factor for determining the dosage regimen of meropenem in addition to patient characteristics and pharmacokinetics.
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