3-Amino-1-hydroxypropylidene-1,1-diphosphonate (APD): a novel enhancer of rectal cefoxitin absorption in rats
- 1 May 1989
- journal article
- Published by Oxford University Press (OUP) in Journal of Pharmacy and Pharmacology
- Vol. 41 (5) , 339-341
- https://doi.org/10.1111/j.2042-7158.1989.tb06468.x
Abstract
The promoting action of the calcium chelating compound EDTA on intestinal drug absorption is supposed to be based on Ca2+ depletion, inducing widening of tight junctions. The aim of the present study was to evaluate the effects of the calcium-binding agent 3-amino-1-hydroxypropylidene-1,1-diphosphonate disodium salt (APD) on rectal cefoxitin absorption in rats. The extent of rectal cefoxitin absorption was enhanced by 0·5 to 6% w/v of APD, on rectal infusion as well as on bolus delivery, the latter regimen tending to result in lower bioavailabilities. A maximal cefoxitin bioavailability of 85 ± 10% was achieved by infusion with 4% w/v of APD, compared with 14 ± 12% without APD.Keywords
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