Fosfomycin kinetics after intravenous and oral administration to human volunteers.
The pharmacokinetics of fosfomycin, administered intravenously and orally at two different doses (20 and 40 mg/kg of body weight), was studied in seven volunteers. The elimination profile of this antibiotic, when administered intravenously, followed a two-compartment kinetic model, independent of dosage, giving an elimination half-life of 2.23 +/- 0.62 h and an average total volume of distribution at steady state of 0.34 liter/kg. Peak serum levels after rapid intravenous administration of 20 and 40 mg/kg were 132.1 +/- 31.8 and 259.3 +/- 32.5 micrograms/ml, respectively. Peak serum levels after oral administration were 7.1 +/- 1.6 and 9.4 +/- 3.6 micrograms/ml for the 20 and 40 mg/kg doses, respectively. During the first 24 h after administration, an average of 80% of the intravenous doses and less than 25% of the oral doses were recovered in the urine.[1]References
- Fosfomycin kinetics after intravenous and oral administration to human volunteers. Goto, M., Sugiyama, M., Nakajima, S., Yamashina, H. Antimicrob. Agents Chemother. (1981) [Pubmed]
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