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Related Experiment Videos

Dissolution rate studies from a stationary disk/rotating fluid system.

N Khoury1, J W Mauger, S Howard

  • 1School of Pharmacy, West Virginia University, Morgantown 26506.

Pharmaceutical Research
|August 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study determined hydrocortisone dissolution rates using a novel stationary disk/rotating fluid system. The findings provide a design equation applicable to pharmaceutical drug release mechanisms.

Area of Science:

  • Pharmaceutical Science
  • Physical Chemistry
  • Chemical Engineering

Background:

  • Understanding drug dissolution is crucial for predicting in vivo performance.
  • Existing models often simplify the complex fluid dynamics involved in drug release.
  • Hydrocortisone is a widely used corticosteroid with variable dissolution profiles.

Purpose of the Study:

  • To determine the dissolution rates of hydrocortisone alcohol and acetate.
  • To develop a design equation for predicting dissolution rates in a rotating fluid system.
  • To investigate the influence of solubility, diffusion, viscosity, rotational speed, and tablet radius on dissolution.

Main Methods:

  • Utilized a stationary disk/rotating fluid system with hydrocortisone tablets in a die.

Related Experiment Videos

  • Varied independent parameters: solubility (Cs), diffusion coefficient (D), viscosity (v), rotational speed (omega), and tablet radius (r).
  • Applied fluid mechanics and convective diffusion models to analyze the system.

    • Main Results:

    • Formulated a design equation: R ∝ Cs * D^(2/3) * v^(-1/6) * ω^(1/2) * r^(3/2).
    • The equation accurately represents the dissolution rate (R) based on the tested variables.
    • Demonstrated a predictable relationship between momentum and mass transport.

    Conclusions:

    • The developed design equation effectively models hydrocortisone dissolution in the specified system.
    • The stationary disk/rotating fluid system is a valuable tool for studying drug release mechanisms.
    • Findings contribute to a better understanding of factors influencing pharmaceutical drug release kinetics.