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. 1981 Apr;11(4):353–359. doi: 10.1111/j.1365-2125.1981.tb01132.x

The effect of probenecid on the pharmacokinetics and distribution of cefoxitin in healthy volunteers.

D S Reeves, D W Bullock, M J Bywater, H A Holt, L O White, D P Thornhill
PMCID: PMC1401675  PMID: 7259928

Abstract

1 Cefoxitin was given by acute intravenous injection to six healthy volunteers, in a crossover study to investigate the effects of concurrent probenecid administration. 2 Serum antibiotic concentrations were determined by microbiological assay. Cefoxitin concentrations were simultaneously determined in the fluid of blisters produced by topical cantharides. All antibiotic was accounted for in the urine. 3 Cefoxitin was administered by intravenous infusion, subsequent to a loading dose, to produce steady state levels in the region of 10 microgram/ml, in one volunteer. The procedure was later repeated after prior administration of probenecid in the same subject. 4 Pharmacokinetic analyses indicated significant changes only in the parameters associated with renal excretion of drugs. Clearance was reduced by half. 5 The absolute and relative amounts of antibiotic in the central and peripheral compartments were calculated for both modes of administration. In the acute study probenecid produced a small change in distribution away from the peripheral or tissue compartment, towards the central compartment. 6 There was no elevation of initial serum concentrations and sustained levels of antibiotic could be accounted for principally by retarded excretion produced by probenecid, with little contribution by alteration in the disposition of antibiotic. 7 The sustained serum levels of cefoxitin that resulted from its decreased excretion were also reflected in blister fluid. It was concluded that the sustained cefoxitin levels produced by probenecid resulted in similar raised levels in the peripheral or "tissue' compartment, since the redistribution away from the peripheral compartment did not contribute materially to other changes in disposition of drug.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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