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Related Experiment Videos

Solubilization of rapamycin.

P Simamora1, J M Alvarez, S H Yalkowsky

  • 1Pharmaceutical Research and Development, Schering-Plough HealthCare Products, Inc., 3030 Jackson Avenue, Memphis, TN 38151, USA. pahala.simamora@spcorp.com

International Journal of Pharmaceutics
|February 13, 2001
PubMed
Summary
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Facilitated hydrotropy dramatically increased rapamycin solubility by over 1000-fold. This technique uses aromatic compounds to enhance the solubility of poorly water-soluble immunosuppressive drugs.

Area of Science:

  • Pharmaceutical Science
  • Drug Delivery
  • Physical Chemistry

Background:

  • Rapamycin is an investigational immunosuppressive drug with poor aqueous solubility.
  • Enhancing drug solubility is critical for effective drug delivery and formulation.
  • Facilitated hydrotropy offers a novel approach to overcome solubility challenges.

Purpose of the Study:

  • To investigate the solubilization of rapamycin using facilitated hydrotropy.
  • To determine the extent of solubility enhancement for rapamycin.
  • To explore the potential of this technique for poorly water-soluble drugs.

Main Methods:

  • Utilized facilitated hydrotropy, employing partially water-miscible aromatic solutes (benzyl alcohol, benzoate, benzoic acid).
  • Employed water-miscible cosolvents (ethanol, propylene glycol) to solubilize aromatic solutes.

Related Experiment Videos

  • Measured the aqueous solubility increase of rapamycin.

    • Main Results:

    • Achieved a dramatic increase in rapamycin's aqueous solubility, exceeding 1000-fold.
    • Demonstrated that solubilized aromatic solutes act as effective solubilizing agents.
    • Confirmed the efficacy of facilitated hydrotropy for poorly water-soluble compounds.

    Conclusions:

    • Facilitated hydrotropy is a highly effective method for significantly increasing the aqueous solubility of rapamycin.
    • This technique holds promise for improving the formulation and delivery of poorly water-soluble immunosuppressive agents.
    • The study highlights a viable strategy for enhancing drug solubility in pharmaceutical development.