Yup. I've been on and off of it for about 4 months now, and just gave up entirely two days ago. Actually have a massive migraine as I type (I've got a barometric-pressure trigger). Grrrr. It's supposed to work for many people, though, so do give it a try...it's supposed to have the least incidence of side-effects of any of the prophylactic drugs used for migraine. I didn't have *any* side effects, but also didn't really notice a decrease in migraine frequency, either. I'm, planning to take a break for a month or so, and then see what's next on the pike. Good luck with it...I hope that it works for you : ).