Valerian is one of the best nerve tonics. In addition to sleep disorders, valerian has been used for gastrointestinal spasms and distress, epileptic seizures, and attention deficit hyperactivity disorder. Valerian is also used for all sorts of nervous conditions. It promotes sleep. It is also used for migraines, convulsions, Hysteria, High Blood Pressure, as a sedative, stomach cramps, fatigue, and vomiting.