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A factor analysis for complex systems containing nimesulide.

G Ceschel1, P Maffei, M C Dragani

  • 1Department of Pharmaceutical Sciences, Via San Donato 19/2, University of Bologna, 40127, Italy. ceschel@biofarm.unibo.it

Journal of Pharmaceutical Sciences
|January 25, 2005
PubMed
Summary
This summary is machine-generated.

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Nimesulide and PEG 4000 binary systems formed two phases upon cooling, with upper phases showing higher dissolution rates. Ternary systems with additives improved homogeneity and dissolution, particularly with triethanolamine.

Area of Science:

  • Pharmaceutical Science
  • Materials Science

Background:

  • Nimesulide is a non-steroidal anti-inflammatory drug (NSAID) with poor aqueous solubility.
  • Polyethylene glycol 4000 (PEG 4000) is a hydrophilic polymer often used in drug formulations.
  • Melting method is a technique for preparing solid dispersions or binary systems.

Purpose of the Study:

  • To prepare and characterize binary systems of Nimesulide and PEG 4000 using the melting method.
  • To investigate the effect of additives on phase separation and dissolution rate of Nimesulide-PEG 4000 systems.
  • To optimize the formulation of Nimesulide-PEG 4000 systems for improved drug delivery.

Main Methods:

  • Preparation of Nimesulide-PEG 4000 binary systems by melting.
  • Separation and characterization of the two phases formed after cooling using DSC and UV spectroscopy.

Related Experiment Videos

  • Preparation of ternary systems by adding various excipients (surfactants, polymers) to the binary system.
  • Factor analysis of complex systems with multiple additives at different concentrations.

    • Main Results:

    • Binary systems formed two distinct phases upon cooling, with upper phases rich in PEG 4000 and lower phases rich in Nimesulide.
    • Upper phases exhibited high dissolution rates, while lower phases showed no improvement over physical mixtures.
    • Ternary systems with sodium dodecyl sulfate and triethanolamine formed homogeneous phases.
    • Triethanolamine significantly improved the dissolution rate in ternary systems.
    • Additives primarily affected the physical properties rather than significantly enhancing dissolution kinetics in most cases.

    Conclusions:

    • Phase separation in Nimesulide-PEG 4000 binary systems can be manipulated to achieve differential drug enrichment.
    • Triethanolamine shows promise as an additive for improving Nimesulide dissolution from PEG 4000 formulations.
    • Further optimization is needed to significantly enhance the kinetic behavior of these complex Nimesulide delivery systems.