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Pharmaceutical Research

, Volume 18, Issue 7, pp 980–986 | Cite as

Comparison of Tissue Concentrations After Intramuscular and Topical Administration of Ketoprofen

  • Irmgard Tegeder
  • Jörn Lötsch
  • Martina Kinzig-Schippers
  • Fritz Sörgel
  • Gary R. Kelm
  • Stephen T. Meller
  • Gerd Geisslinger
Article

Abstract

Purpose. To assess whether topical ketoprofen, which has been reported to provide analgesic effects in clinical studies, reaches predictable tissue concentrations high enough to account for the reported analgesia. Intramuscular ketoprofen was used as positive control.

Methods. Muscle and subcutaneous tissue concentrations were assessed by microdialysis. Plasma and tissue concentrations after intramuscular injection were described using a three-compartment population pharmacokinetic model. The prediction performance of the model was assessed by superimposing tissue concentrations of 12 subjects that did not participate in the present study.

Results. Most dialysate concentrations after topical dosing of ketoprofen (100 mg) were below the quantification limit of 0.47 ng/ml. Plasma concentrations increased slowly and reached an apparent plateau of 7-40 ng/ml at 10-12h. No decline was observed up to 16 h. Tissue concentrations after intramuscular injection (100 mg) were about 10 times higher than those after topical dosing. Tissue concentrations measured in the majority of the 12 subjects that did not participate in the present study were found within the range of two-thirds of the predicted concentrations.

Conclusion. Predictable and cyclooxygenase-inhibiting concentrations of ketoprofen were achieved in subcutaneous and muscle tissue after intramuscular but not after topical dosing. Thus, the tissue concentrations of ketoprofen after topical administration can hardly explain the reported clinical efficacy of topical ketoprofen.

microdialysis ketoprofen NSAIDs topical administration population pharmacokinetic model 

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Copyright information

© Plenum Publishing Corporation 2001

Authors and Affiliations

  • Irmgard Tegeder
    • 1
  • Jörn Lötsch
    • 1
  • Martina Kinzig-Schippers
    • 2
  • Fritz Sörgel
    • 2
  • Gary R. Kelm
    • 3
  • Stephen T. Meller
    • 3
  • Gerd Geisslinger
    • 1
  1. 1.Zentrum der Pharmakologie, Klinikum der Johann Wolfgang Goethe-Universität FrankfurtFrankfurt am MainGermany
  2. 2.Institut für Biomedizinische und Pharmazeutische ForschungNürnberg-HeroldsbergGermany
  3. 3.Personal Health CareProcter & Gamble Health Care Research CenterMason

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