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[Pharmacokinetics--pharmacodynamics of modafinil in mice]

Zhang-Qing Ma1, Zong-Yuan Hong, Wu-San Wang

  • 1Institute of Quantitative Pharmacology, Department of Pharmacology, Wannan Medical College, Wuhu 241002, China.

Yao Xue Xue Bao = Acta Pharmaceutica Sinica
|April 12, 2012
PubMed

Insights

This study investigated modafinil (MOD) pharmacokinetics and pharmacodynamics in mice. Modafinil significantly increased locomotor activity, showing a strong correlation with its plasma concentration.

Area of Science:

  • Pharmacology
  • Neuroscience
  • Drug Metabolism

Background:

  • Modafinil (MOD) is a wakefulness-promoting agent.
  • Understanding its pharmacokinetic and pharmacodynamic profile is crucial for clinical application.
  • Previous studies have explored its effects, but detailed correlation analysis in mice is needed.

Purpose of the Study:

  • To investigate the pharmacokinetics and pharmacodynamics of modafinil in mice.
  • To determine the correlation between modafinil plasma concentration and its locomotor activity effects.
  • To guide the rational clinical use of modafinil.

Main Methods:

  • Male Kunming mice received a single oral dose of modafinil (120 mg/kg).
  • Plasma modafinil concentrations were measured using High-Performance Liquid Chromatography (HPLC).
  • Locomotor activity was recorded using an infrared ray passive sensor.

Main Results:

  • Modafinil exhibited a two-compartment open model with first-order absorption.
  • Key pharmacokinetic parameters included t1/2α (0.42 h), t1/2β (3.10 h), tmax (1.00 h), Cmax (41.34 mg/L), and AUC(0-∞) (142.22 mg·h/L).
  • Modafinil significantly enhanced locomotor activity for approximately 4 hours, with synchronous changes in plasma concentration.

Conclusions:

  • A significant correlation exists between modafinil's effects and its plasma concentration in mice at the studied dose.
  • These findings support the rational clinical application of modafinil based on its concentration-effect relationship.
  • The study provides valuable data for understanding modafinil's action in a preclinical model.

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