The present system is directed in several embodiments to a method of administration of a therapeutic composition for treatment of seizures resulting from epilepsy and other seizure disorders. The method includes administering one or more therapeutic compositions comprising an effective amount of insulin directly to the subject patient's CNS, with no to minimal systemic exposure. Preferably, this method comprises administration of an effective amount of insulin to the upper third of a patient's nasal cavity, thereby bypassing the patient's blood-brain barrier and delivering the therapeutic composition directly to the patient's central nervous system.
