seizures
"If it was possible to give this a 0, I would. I've had the hiccups for almost a year. My neurologist thinks they're "a strange presentation of clonic seizures in the brain stem". Weird, but okay. I've been on 500 mg for four days. In that time, I've lost consciousness twice, had three nosebleeds, been dizzy and lightheaded, had constant trouble breathing, had ridiculous mood swings from angry to crying in the blink of an eye, and been unable to walk a straight line. I feel drunk. It's horrible."