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Related Experiment Videos

Erythromycin ethyl succinate: diffusion through interstitial dermal fluid.

L Vaillant1, G Lorette, J Loulergue

  • 1Department of Dermatology, C.H.U. Trousseau, Tours, France.

European Journal of Clinical Pharmacology
|January 1, 1987
PubMed
Summary
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Erythromycin ethyl succinate (EES) effectively diffuses into skin dermal fluid after oral administration. This study shows good EES skin penetration between 2 and 12 hours post-dose.

Area of Science:

  • Pharmacokinetics
  • Dermatology
  • Drug Delivery

Background:

  • Erythromycin is a common dermatological treatment.
  • Limited data exists on its skin diffusion.
  • Understanding drug penetration is crucial for topical efficacy.

Purpose of the Study:

  • To investigate the diffusion of erythromycin ethyl succinate (EES) in dermal fluid.
  • To quantify EES penetration through normal human skin.
  • To establish the pharmacokinetic profile of EES in skin.

Main Methods:

  • Utilized the suction blister method to collect dermal fluid (SBF).
  • Collected blood samples concurrently from 10 healthy volunteers.
  • Administered 1g of EES orally and sampled over 24 hours.

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Main Results:

  • Median peak serum EES concentration was 2.05 µg/ml; SBF concentration was 0.34 µg/ml.
  • The median ratio of SBF to serum AUC (f SBF/f serum) was 43%.
  • EES concentrations in SBF exceeded 0.1 µg/ml between 2 and 12 hours post-administration.

Conclusions:

  • Erythromycin ethyl succinate demonstrates good diffusion into normal skin.
  • Significant skin penetration occurs between 2 and 12 hours after oral intake.
  • Findings support the potential for effective topical delivery of EES.