The pharmacokinetics of cefmetazole, a new cephamycin antibiotic, were examined after a 1-h intravenous drip infusion of 1 g to 5 healthy volunteers with normal renal function and 16 patients with impaired renal function. Peak serum concentrations were obtained at the end of the infusion in all subjects, regardless of their renal function. Approximately 70% of the infused dose was excreted in the urine within 6 h in healthy volunteers. The pharmacokinetic parameters of cefmetazole were derived by analyzing elimination data, with a one-compartment open model. The mean serum half-life of cefmetazole in healthy volunteers was 0.81 h. A significant correlation between the elimination rate constant and the creatinine clearance was demonstrated
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