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Related Experiment Videos

Dissolution at porous interfaces VI: Multiple pore systems.

H Grijseels, D J Crommelin, C J De Blaey

    Journal of Pharmaceutical Sciences
    |December 1, 1984
    PubMed
    Summary

    This study demonstrates that cubic pores on theophylline tablets enhance dissolution rates by creating turbulent flow. A critical pore diameter effect was observed, influencing drug release from the tablet surface.

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    Area of Science:

    • Pharmaceutical Sciences
    • Physical Chemistry
    • Materials Science

    Background:

    • Theophylline tablets are a common dosage form.
    • Surface modifications can alter drug dissolution rates.
    • Understanding dissolution kinetics is crucial for drug efficacy.

    Purpose of the Study:

    • To investigate the effect of cubic pores on theophylline tablet dissolution.
    • To analyze the hydrodynamics and erosion patterns induced by surface pores.
    • To determine if a critical pore diameter phenomenon applies to cubic pores.

    Main Methods:

    • Fabrication of cubic pores on theophylline tablet surfaces using rapidly dissolving sodium chloride particles.
    • Dissolution rate studies using a rotating disk apparatus.
    • Analysis of flow patterns and surface erosion under varying rotation speeds.

    Main Results:

    • Cubic pores induced turbulent flow regimens and enhanced surface erosion, similar to drilled pores.
    • A critical pore diameter effect was observed, influencing dissolution.
    • Increased pore coverage led to complications, likely due to pore merging.
    • Pores altered boundary layer flow from laminar to turbulent, increasing local dissolution flux.

    Conclusions:

    • Surface pores significantly influence the dissolution behavior of theophylline tablets.
    • The critical pore diameter phenomenon is relevant for cubic pore designs.
    • Optimizing pore characteristics is key to controlling drug release kinetics.

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