The invention discloses application of an exogenous NO donor in preparation of a
medicine for treating and / or preventing
epilepsy, and belongs to the technical field of biological
medicine. According to the invention, the inhibition effect of long-term application of the exogenous NO donor on
epilepsy is confirmed for the first time. A mouse is intervened by using an exogenous NO donor DETA / NONOate during the
epilepsy occurrence period and after the epilepsy
pathology is formed, so that the formation of epilepsy can be blocked when the application is performed during the epilepsy occurrence period, and the
epilepsy seizure can be blocked and complications such as
cognition and depression can be improved when the application is performed after the epilepsy
pathology is formed; the invention further verifies the prevention and treatment effects of DETA / NONOate on epilepsy after long-term application, and further researches find that an exogenous NO donor slowly releases NO in the brain of a mouse so as to inhibit the generation of an abnormal neural circuit of dentate gyrus granulosa cells and finally inhibit the occurrence of chronic epilepsy.