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  • Title: Pharmacokinetics of cefpirome during continuous venovenous hemofiltration: rationale for an 8-hour dosing interval.
    Author: Banyai M, Thalhammer F, El-Menyawi I, Heinz G, Traunmüller F, Siostrzonek P.
    Journal: Clin Pharmacol Ther; 2000 Apr; 67(4):368-72. PubMed ID: 10801245.
    Abstract:
    OBJECTIVE: Cefpirome is a new semisynthetic cephalosporin, primarily eliminated by the kidneys, that requires dosage adjustment in patients with kidney failure. The optimal dosing regimen of cefpirome in patients with continuous veno-venous hemofiltration (CVVH) is unknown. METHODS: Pharmacokinetic properties of cefpirome were investigated in eight anuric patients with acute kidney failure treated by CVVH. All patients received a dosage of 2 g cefpirome every 8 hours after starting the hemofiltration with high-flux polysulfone membranes. Concentrations of cefpirome in plasma and ultrafiltrate were measured by HPLC. RESULTS: Total clearance and hemofiltration clearance of cefpirome were 589.1 +/- 164.5 mL/min and 43.3 +/- 7.8 mL/min, respectively. Serum elimination half-life was 2.36 +/- 0.59 hours. The highest plasma drug concentration was 14.8 +/- 3.2 microg/mL, and it declined to trough levels of 3.1 +/- 0.8 microg/mL at the end of the dosing interval. CONCLUSION: On the basis of previously published pharmacodynamic characteristics of cefpirome and the pharmacokinetic parameters obtained in this study, we calculated a required total daily dose of 2 g every 8 hours to achieve sufficient plasma antibiotic levels to cover the majority of target pathogens. However, this dosage may be insufficient during CVVH for intermediate resistant strains of Pseudomonas aeruginosa.
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