Abstract
Following 4 g of ceftriaxone, given intravenously, to eight volunteers, the antibiotic concentration in serum, suction skin blister fluid and fluid from subcutaneously implanted threads was followed for 28 h. High and sustained levels were found in both serum and extravascular fluids; the mean maximum serum concentration was 448 mg/l, and the mean peak concentrations in blister and thread fluid were 94 mg/l and 63 mg/l, respectively. The terminal, half-lives were: serum 7.2 h, blister fluid 10.3 h and thread fluid 11.3 h. The total area under the concentration versus time curves for serum was 1636 mg X h/l. For blister and thread fluid the areas were 1573 mg X h/l and 808 mg X h/l. The results suggest a twice daily dosage regimen.
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