Topiramate
"I have had estrogen- and barometric migraine since my mid-twenties. I was noticing that the intensity & frequency of said migraines were getting worse over time (I'm 47 now). I was over-presrcribed Imitrex & was having rebound migraines, suffering 20  migraines/mo. So far, I've been on this med for a little over 2 weeks, & am on 25 mg. I don't think I need to go any higher right now, which is fine by me. For the first 4 days, I had a horrid migraine, felt dizzy & had some nausea. After that, I started feeling a lot better, more alert, no pain, felt sharper too. I'm in peri menopause & have noticed that I get a migraine around the time of my period, but it's about a 5 or 6 instead of a 10 . So far is working w/very few & side effects."