Dissolution enhancement of gliclazide by preparation of inclusion complexes with Î²-cyclodextrin
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practically insoluble in water and exhibits an exceedingly slow intrinsic dissolution rate and poor bioavailability. The
present study has emphasized on improving the solubility and dissolution rate of the drug by forming inclusion complex
with Î²-cyclodextrin. Phase solubility studies indicated the formation of 1:2 M complex in solution. The value of apparent
stability constant Kc was found to be 691.45 Mâ€“1. The inclusion complexes were prepared by physical mixture and kneading
method. Prepared complexes were characterized by infrared (IR) spectroscopy and differential scanning calorimetry (DSC)
studies, which indicated formation of 1:2 M complex. The gliclazide:Î²-CD (1:2 M) complex prepared by kneading method
exhibited higher dissolution rate and dissolution efficiency values in 0.1-N HCl. A 20.31-fold increase in dissolution rate
and 16.50-fold increase in dissolution efficiency values were observed in the kneading method.
Key words: Î²-cyclodextrin, gliclazide, kneading method, physical mixture
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