Methods of treating a seizure disorder with a maxi-K channel opener or a pharmaceutically acceptable salt thereof are provided. In embodiments, suitable maxi-K channel openers are be fluoro-oxindole or chloro-oxindole compounds. In some embodiments, the maxi-K channel opener may be (3S)-(+)-(5-chloro-2-methoxyphenyl)-1,3-dihydro-3-fluoro-6-(trifluoromethyl)-2H-indole-2-one or pharmaceutically acceptable salts thereof. The methods provide therapeutic compositions that may be used to improve one or more symptoms of a seizure disorder.
