Pharmacokinetics and tissue penetration of cefprozil

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Abstract
The pharmacokinetics of cefprozil after a single 500 mg oral dose were studied, measuring plasma, inflammatory fluid and urine concentrations. Mean peak plasma concentrations of 9.6mg/l (measured by bioassay) were achieved at a mean time of 1.9 h after administration. The mean plasma elimination half-life was 1.4 h; 63.6% of the dose was eliminated in urine by 24 h. Mean peak levels in inflammatory fluid reached 4.9 mg/l after 3.5 h. Mean plasma levels remained 2 mg/l for almost 5 h post dose and more than 6 h in inflammatory fluid. These data suggest that infections caused by highly susceptible pathogens might respond to a twice dairy dosing regimen and less susceptible pathogens might require a higher dose or more frequent administration.

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