Tissue penetration of cefpodoxime and cefixime in healthy subjects

Ping Liu, Markus Müller, Maria Grant, Bernd Obermann, Hartmut Derendorf

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Microdialysis is a technique that allows the measurement of free antibiotic concentrations in different tissues, which are responsible for the antibacterial activity at the infection site. In an open, randomized, 2-way crossover study in healthy volunteers, the muscle penetration of orally administered cefpodoxime (400 mg) and cefixime (400 mg) was compared using microdialysis, The results show that the total plasma concentration-time profiles of each antibiotic were similar; the area under the curve for cefpodoxime was 22.4 ± 8.7 versus 25.6 ± 8.5 mg/LFisheyeh for cefixime. However, tissue penetration was twice as high for cefpodoxime (area under the curve 15.4 ± 5.1 mg/LFisheyeh) as for cefixime (area under the curve 7.3 mg/LFisheyeh), This degree of tissue distribution is consistent with their protein binding of 21% for cefpodoxime and 65% for cefixime. After equilibration, the unbound tissue concentrations of both antibiotics were similar to their unbound plasma concentrations. Pharmacokinetic modeling was applied to describe the pharmacokinetic profiles in plasma and muscle. The study demonstrates that cefpodoxime shows greater tissue penetration than cefixime.

Original languageEnglish (US)
Pages (from-to)564-569
Number of pages6
JournalJournal of clinical pharmacology
Volume45
Issue number5
DOIs
StatePublished - May 1 2005

Keywords

  • Cefixime
  • Cefpodoxime
  • Microdialysis
  • Pharmacokinetics
  • Tissue penetration

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)

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