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Related Experiment Video

Updated: May 29, 2026

Use of Rabbit Eyes in Pharmacokinetic Studies of Intraocular Drugs
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Published on: July 23, 2016

Emodin pharmacokinetics in rabbits

J W Liang1, S L Hsiu, P P Wu

  • 1Graduate Institute of Pharmaceutical Chemistry, China Medical College, Taichung, Taiwan.

Planta Medica
|October 1, 1995
PubMed
Summary

Emodin

Area of Science:

  • Pharmacokinetics
  • Drug Metabolism
  • Natural Products

Background:

  • Emodin, a natural anthraquinone, is found in various medicinal plants.
  • Understanding emodin's pharmacokinetic profile is crucial for its therapeutic applications.
  • Previous studies reported shorter elimination half-lives for emodin.

Purpose of the Study:

  • To characterize the pharmacokinetic profile of emodin in rabbits.
  • To compare the elimination half-life with previous findings.
  • To investigate emodin's serum protein binding characteristics.

Main Methods:

  • Intravenous (i.v.) bolus administration of emodin to rabbits.
  • Serum concentration-time data analyzed using a two-compartment model.
  • Equilibrium dialysis method used for protein binding assessment.

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Main Results:

  • Emodin followed a two-compartment model after i.v. administration.
  • Key pharmacokinetic parameters: AUC (518 µg·min/mL), clearance (72.3 mL/min), and elimination half-life (227 min).
  • Oral administration yielded very low serum concentrations, and emodin showed high serum protein binding (99.6%).

Conclusions:

  • Emodin exhibits a prolonged elimination half-life in rabbits compared to prior reports.
  • High protein binding may influence emodin's distribution and efficacy.
  • Further research is needed to elucidate the implications of these pharmacokinetic findings.