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In vitro protein binding interaction studies involving cefixime
Authors:M Bialer  W H Wu  R D Faulkner  B M Silber  A Yacobi
Affiliation:Department of Pharmacodynamics, American Cyanamid Company, Pearl River, New York 10965.
Abstract:
Cefixime is a new oral cephalosporin currently undergoing clinical trials. Selected agents with the likelihood for coadministration with cefixime in man were examined for their influence on the in vitro binding of cefixime in pooled serum from dog, monkey, and man. Results from these experiments showed no significant change in cerfixime binding in any animal species studied or in man by acetaminophen, heparin, phenytoin, diazepam, ibuprofen or furosemide at their maximum reported therapeutic concentrations. In contrast, both salicylic acid and probenecid resulted in concentration-dependent increases in the free fraction of cefixime (up to 2.5-fold). These findings demonstrate the usefulness of in vitro protein binding screening procedures for studying potential drug interactions that are mediated, at least in part, by changes in the protein binding of a drug.
Keywords:Cefixime  Oral Cephalosporin  Protein binding interactions
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