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The acceptance criteria for dissolution profile data are anchored in Q values, representing the percentage of drug dissolved within a specified period. This assessment unfolds in three stages:First Stage: The test passes if all six drug dosage units are equal to or greater than Q plus 5%; otherwise, the sample proceeds to the second stage.Second Stage: The average of twelve units must be equal to or greater than Q, with no unit falling below Q - 15% to pass; if not, it progresses to the final...
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Understanding the relationship between wettability and dissolution of solid dispersion.

Yi Lu1, Ning Tang1, Ruyue Lian1

  • 1School of Pharmacy, Fudan University, Shanghai 201203, PR China.

International Journal of Pharmaceutics
|February 15, 2014
PubMed
Summary

Wettability, measured by contact angle and water absorption rate, significantly impacts drug dissolution in solid dispersions. These properties can predict dissolution transitions, aiding in formula screening for simvastatin solid dispersions.

Keywords:
Contact angleDissolutionSimvastatinSolid dispersionWater absorptionWettability

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Area of Science:

  • Pharmaceutical Sciences
  • Materials Science

Background:

  • Improved wettability is crucial for enhanced drug dissolution in solid dispersions.
  • The precise relationship between wettability and dissolution kinetics remains underexplored.

Purpose of the Study:

  • To investigate the correlation between wettability parameters (contact angle, water absorption rate) and dissolution behavior of simvastatin solid dispersions.
  • To establish wettability as a predictive tool for solid dispersion formulation development.

Main Methods:

  • Preparation of simvastatin-polyvinylpyrrolidone solid dispersions with and without sodium dodecyl sulfate.
  • Measurement of dissolution profiles, contact angles, and water absorption rates.
  • Analysis of the relationship between wettability metrics and dissolution efficiency.

Main Results:

  • Dissolution rate increased abruptly with polyvinylpyrrolidone concentration exceeding a critical value.
  • Contact angle decreased with increasing polyvinylpyrrolidone content.
  • Dissolution efficiency showed a strong inverse correlation with contact angle and a positive correlation with water absorption rate, with critical transition points identified.

Conclusions:

  • Contact angle and water absorption rate serve as effective indicators for predicting dissolution transitions in solid dispersions.
  • These wettability parameters demonstrate significant potential for optimizing solid dispersion formulations during screening.