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Consistency study of semi-solid pharmaceutical preparations

S Purwar, N H Choulis

    Die Pharmazie
    |January 1, 1980
    PubMed
    Summary

    This study evaluated the consistency of semi-solid pharmaceutical bases, including ointments and soft paraffin. Researchers developed a mathematical model to predict consistency under varying temperatures and shear stress.

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    Area of Science:

    • Pharmaceutical Sciences
    • Materials Science

    Background:

    • Semi-solid pharmaceutical preparations require consistent physical properties for effective drug delivery.
    • Ointment bases are crucial for topical formulations, influencing drug release and stability.

    Purpose of the Study:

    • To assess the consistency of various semi-solid pharmaceutical bases.
    • To investigate the impact of temperature and shearing stress on preparation consistency.
    • To develop a predictive mathematical model for extrapolation of results.

    Main Methods:

    • Consistency testing of simple ointment base, paraffin ointment base, emulsifying ointment base, and soft paraffin.
    • Utilized a laboratory-designed apparatus for precise measurements.
    • Varied temperature and applied shearing stress to simulate different conditions.

    Main Results:

    • Established consistency profiles for the tested semi-solid pharmaceutical preparations.
    • Quantified the influence of temperature and shearing stress on rheological behavior.
    • Developed a mathematical equation to extrapolate consistency data.

    Conclusions:

    • The developed mathematical model accurately predicts the consistency of semi-solid pharmaceutical bases.
    • Understanding rheological properties is vital for quality control and formulation development.
    • This research provides a foundation for optimizing semi-solid pharmaceutical formulations.

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