Method: Solid dispersion systems of ursolic acid in PVP-K30 or Poloxamer 188 were prepared by co-evaporation of the drug and PVP-K30 or Poloxamer 188 ethanol solution.

• 方法：选择聚乙烯吡咯烷酮K30、泊洛沙姆188两种载体，用溶剂法制备乌索酸固体分散体；