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[Preparation of solid dispersion of triterpenoid acids from Eriobotrya japonica leaf and study on their dissolution
Unlabelled:
To prepare the solid dispersion of Eriobotrya japonica leaf triterpenoid acids(EJA) in order to enhance their dissolution characteristics in vitro.
Methods:
Taking ursolic acid and oleanolic acid in vitro dissolution as an indicator, the influence of factors including different water-soluble carriers (PEG 6000, PVPk30 and P188) and the drug/carrier weight ratio for the preparation of solid dispersion were examined using single factor experiment. Differential scanning calorimetry (DSC) and X-ray diffraction (X-RD) were used to describe the characterization of solid dispersion.
Results:
P188 was used as appropriate carrier for the preparation of solid dispersion and the drug/carrier weight ratio was 1:5. The X-RD and DSC showed EJA existed in the solid dispersion as the way of amorphous. The dissolution rate of EJA solid dispersion was significantly higher than physical mixture and EJA.
Conclusion:
The solid dispersion prepared with P188 can significantly increase the solubility and dissolution of EJA in vitro. This study provides the scientific evidence for further preparation of solid dispersion tablet.
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