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Related Experiment Videos

Comparison of surface modification and solid dispersion techniques for drug dissolution.

C Rouchotas1, O E Cassidy, G Rowley

  • 1Institute of Pharmacy and Chemistry, School of Sciences, Pasteur Building, University of Sunderland, UK.

International Journal of Pharmaceutics
|February 17, 2000
PubMed
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Surface modification of phenylbutazone (PB) with Synperonic F127 significantly improved drug release. Combining techniques altered release rate but not extent compared to surface modification alone.

Area of Science:

  • Pharmaceutical Sciences
  • Materials Science

Background:

  • Hydrophobic drugs often exhibit poor dissolution, limiting their bioavailability.
  • Surface modification and solid dispersion are key formulation strategies to enhance drug solubility and release.

Purpose of the Study:

  • To compare the effects of surface modification and solid dispersion on phenylbutazone (PB) dissolution.
  • To investigate the combined effect of these techniques on PB release.

Main Methods:

  • Phenylbutazone (PB) was surface-modified with poloxamer Synperonic F127.
  • Solid dispersions of PB and modified PB (PBT) were prepared using molten F127.
  • Dissolution tests were conducted in pH 6.4 buffer at 37°C.

Main Results:

Related Experiment Videos

  • Surface-modified PB (PBT) showed 85.6% release in 140 min, compared to 16.7% for unmodified PB.
  • Solid dispersion of PB achieved 71.4% release, while PBT solid dispersion showed similar extent but higher rate than PBT alone.
  • Drug-polymer contact nature, not amount, appeared critical for dissolution enhancement.

    • Conclusions:

    • Both surface modification and solid dispersion significantly improve PB dissolution.
    • Surface modification alone provides a high extent of drug release.
    • Combining techniques enhances release rate without increasing the maximum release extent over surface modification.