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Related Experiment Videos

Finite dose percutaneous drug absorption: a BASIC program for the solution of the diffusion equation.

K Kubota1

  • 1Division of Clinical Pharmacology, National Medical Center, Tokyo, Japan.

Computers and Biomedical Research, an International Journal
|April 1, 1991
PubMed
Summary

This study presents a BASIC program for finite dose percutaneous absorption pharmacokinetics. The program accurately models drug diffusion and concentration over time using Fourier series, aiding pharmacokinetic analysis.

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Area of Science:

  • Pharmacokinetics
  • Mathematical Modeling
  • Drug Delivery

Background:

  • Percutaneous absorption pharmacokinetics involves complex diffusion processes.
  • Accurate modeling is crucial for understanding drug behavior in the skin.
  • Existing models may have limitations in specific scenarios.

Purpose of the Study:

  • To develop a computational tool for analyzing finite dose percutaneous absorption.
  • To model drug diffusion dynamics within the skin and systemic circulation.
  • To provide accurate time-dependent solutions for key pharmacokinetic parameters.

Main Methods:

  • Implementation of a BASIC program utilizing Fourier series.
  • Modeling the diffusion equation for drug transport.
  • Calculating drug amounts in the vehicle (Av) and skin (As).

Related Experiment Videos

  • Determining drug flux (J) and blood concentration (C) over time.

    • Main Results:

    • The program provides accurate solutions for Av, As, J, and C as functions of time.
    • A small number of Fourier series terms (typically <10) yield precise results.
    • The study demonstrates a limiting case of the diffusion equation for high diffusion coefficients and clearance.

    Conclusions:

    • The developed BASIC program offers an effective method for pharmacokinetic analysis of percutaneous absorption.
    • Fourier series provide an efficient means to solve the diffusion equation in this context.
    • The findings enhance the understanding of drug permeation and systemic distribution through the skin.