The invention relates to a medicament, in particular to a medicament prepared from traditional Chinese medicines as raw materials for treating epilepsia. In the invention, the problems of large side effects, easiness for generation of resistance to drugs and poor effect of the traditional medicament for treating the epilepsia are mainly solved. The medicament for treating the epilepsia is prepared from periostracum cicada, stiff silkworm, agilawood and yam. The specific preparation method comprises the steps of: firstly, infusing the agilawood with yellow wine; secondly, frying the periostracum cicad until the periostracum cicad smokes and blackens, and cooling; thirdly, uniformly mixing the infused agilawood, the fried black periostracum cicad and the stiff silkworm and the yam, crushing into 80-120mu, loading into a capsule, sterilizing and disinfecting to prepare a capsule. The medicament is used for treating both principal and secondary aspects of the epilepsia without toxic and side effects and additional damage to patients, has low treatment cost, is taken for a long time without generating resistance to drugs, and has a remarkable treatment effect.