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Related Experiment Videos

In vitro dissolution of dapsone.

J Swarbrick, D Ma

    The Journal of Pharmacy and Pharmacology
    |December 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    This study reveals dapsone (DDS) dissolution follows a biphasic pattern, influenced by particle size. Dissolution rates are linked to the DDS geometric mean diameter, impacting drug release kinetics.

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    Area of Science:

    • Pharmaceutical Sciences
    • Physical Chemistry
    • Materials Science

    Background:

    • Dapsone (DDS) is a crucial antimicrobial agent.
    • Understanding DDS dissolution kinetics is vital for optimizing drug delivery and therapeutic efficacy.
    • Particle size significantly influences the dissolution rate of active pharmaceutical ingredients.

    Purpose of the Study:

    • To investigate the in vitro dissolution behavior of dapsone (DDS) with varying particle sizes.
    • To determine the dissolution law governing DDS release.
    • To identify factors affecting the biphasic dissolution phenomenon observed in DDS.

    Main Methods:

    • Preparation of dapsone (DDS) samples with controlled geometric mean diameters (20-50 microns).
    • Utilizing an in vitro flow-through dissolution cell maintained at 37°C.

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  • Analysis of dissolution data using the Hixson-Crowell cube root dissolution law.

    • Main Results:

    • Dapsone (DDS) dissolution exhibited a biphasic pattern, fitting the Hixson-Crowell law up to a critical time (Tc).
    • A distinct break in the dissolution profile occurred at Tc, corresponding to the dissolution of the smallest particles.
    • The initial dissolution slopes were inversely proportional to the geometric mean diameter of DDS particles.

    Conclusions:

    • The dissolution of dapsone (DDS) is a biphasic process influenced by particle size distribution.
    • The Hixson-Crowell cube root law accurately describes initial DDS dissolution, with a critical time marking a change in behavior.
    • Drug release rate is directly predictable from the DDS geometric mean diameter, offering insights for formulation development.