definition of Depakote (divalproex sodium): Depakote®, which contains sodium valproate and valproic acid, is an anticonvulsant used to treat epilepsy. This medication affects the way that cells get signals to turn on and off in the nervous system. This medication can have serious side effects, especially in children. Depakote is usually prescribed to treat mania in people with manic-depressive disorder, to prevent seizures in people with epilepsy, and to prevent migraines. People with autism who also have seizures might be prescribed this medication. Anti-seizure medicines may not completely eliminate seizures but might reduce the number of seizures. Doses and blood levels of Depakote need to be watched closely by a doctor or other health care professional.