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Related Experiment Videos

Solid-state dispersions employing urethan.

H V Maulding

    Journal of Pharmaceutical Sciences
    |March 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Incorporating poorly water-soluble drugs into urethan matrices significantly enhances dissolution rates. Solid dispersions and physical mixtures with urethan show marked improvements compared to pure drug substances.

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    Area of Science:

    • Pharmaceutical Sciences
    • Materials Science

    Background:

    • Poorly water-soluble drugs pose challenges in achieving effective therapeutic concentrations.
    • Solid-state dispersions are a strategy to improve drug solubility and dissolution.
    • Urethan polymers offer potential as matrices for drug delivery systems.

    Purpose of the Study:

    • To investigate the impact of urethan matrices on the dissolution rates of poorly water-soluble drugs.
    • To compare the efficacy of solid-state dispersions versus physical mixtures with urethan.
    • To evaluate drug content in solution using different filtration methods.

    Main Methods:

    • Preparation of drug-urethan solid-state dispersions via heat fusion.
    • Preparation of physical mixtures of drugs and urethan.

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  • Measurement of drug dissolution rates from prepared systems.
  • Comparison of ultrafiltration and cotton filtration for determining dissolved drug content.

    • Main Results:

    • Significant enhancement in initial dissolution rates observed for drugs in urethan solid-state dispersions.
    • Marked increase in drug solubility for both solid dispersions and physical mixtures compared to pure drugs.
    • Dissolution rate improvements were notable for griseofulvin, hydrocortisone, chloramphenicol, and acetaminophen.
    • Physical mixtures showed over 50% of the dissolution enhancement seen in solid-state dispersions.

    Conclusions:

    • Urethan matrices, particularly through solid-state dispersions, effectively enhance the dissolution of poorly water-soluble drugs.
    • Both solid-state dispersions and physical mixtures with urethan offer improved drug release profiles.
    • The findings support the use of urethan in developing advanced drug delivery systems for poorly soluble compounds.