[Solubilization on cryptotanshinone by hydroxypropyl-beta-cyclodextrin and preparation of their inclusion compound].

Objective: To prepare cryptotanshinone (CT)-cyclodextrin inclusion compound and improve dissolution of CT.

Method: Inclusion ratio was determined by plotting the phase solubility curve of CT versus hydroxypropyl-beta-cyclodextrin (HPCD). CT-cyclodextrin inclusion compound was made by wet grinding method. Properties of the inclusion compound was investigated by in vitro dissolution test, DTA and IR spectrum.

Result: Inclusion ratio of CT versus HPCD was 1:1. Dissolution of CT-HPCD inclusion compound at 45 min was 21.6 times of material drug.

Conclusion: Dissolution of CT was improved remarkably in CT-HPCD inclusion compound. The complexation force of the inclusion compound was hydrogen bond formed by carbonyl group of CT and hydroxyl group of HPCD.