The seeds of Zizyphus Jujuba have been used as an antianxiety agent for the treatment of insomnia from the earliest times. Sanjoinine-A, isolated from the seeds of Zizyphus Jujuba, have been found to have a minor tranquilizer activity. However this drug is poorly soluble in water. In order to increase the dissolution rate of sanjoinine-A, solid dispersions with PVP-MC and inclusion complex with ${eta}-cyclodextrin$ were prepared and evaluated. All of these systems increased the dissolution rate of sanjoinine A comparing with sanjoinine-A free base. From pH-rate profile of sanjoinine-A at $60^{circ}C$, it was found that sanjoinine A was relatively stable in acidic solution, but unstable in basic solution.