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Journal of Chinese Pharmaceutical Sciences ›› 2015, Vol. 24 ›› Issue (1): 47-53.DOI: 10.5246/jcps.2015.01.006

• Original articles • Previous Articles     Next Articles

Complexation of poorly aqueous soluble drug risperidone with hydroxypropyl-β-cyclodextrin enhances its dissolution

Weina Ma1,2, Fugen Gu2*, Yi Wang2, Gendalai Meng2, Chunzhi Wu2   

  1. 1. School of Pharmacy, Inner Mongolia Medical University, Hohhot 010110, China
    2. Department of Pharmacy, Affiliated Hospital, Inner Mongolia Medical University, Hohhot 010050, China
  • Received:2014-09-18 Revised:2014-10-17 Online:2015-01-15 Published:2014-11-06
  • Contact: Tel.: 86-471-6636650, Fax: 86-471-6636650
  • Supported by:
    Science and Technology Million Project of Inner Mongolia Medical University (Grant No. YKD2014KJBW012).

Abstract:

In the present study, we investigated the complexation of risperidonewith hydroxypropyl-β-cyclodextrin (HP-β-CD) in aqueous solution due to the poor water solubility and low oral bioavailability of risperidone in humans. The effect of temperature on the complexation was examined, and thermodynamic parameters of the complexation process, such as Gibbs free energy changeG), enthalpy change (ΔH) and entropy change (ΔS),were also explored. Meantime, the solid dispersion of risperidonewith HP-β-CD was prepared and confirmed by Fourier IR spectroscopy and X-ray diffractometry. The experimental results suggested that the complex of the drugwith HP-β-CD at a molar ratio of 1:1 could form in aqueous solution, and the complexation was an endothermic and entropy-driven process. The risperidone-HP-β-CD solid dispersion exhibited a remarkable improvement in the dissolution rate of the drug.This might be attributed to the amorphous state, the enhanced wettability as well as the complex formation of the drug with HP-β-CD in aqueous solution.

Key words: Risperidone, HP-β-CD, Complexation, Solid dispersion, Dissolution

CLC Number: 

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