The aim of this study was to investigate the feasibility of adopting the effervescent agent to increase the dispersion rate of dry suspensions in water. Formulations of effervescent dry suspensions(EDS) were developed with breviscapine as the model drug, and the influences of formulation compositions on dispersion rate, p H value, loss on drying, and sedimentation volume ratio of EDS were investigated. The in vitro dissolution profiles and stability were also evaluated. The results showed that the dispersio...