It's been a while since I was on prophylactics, so I don't recall them all off the top of my head. Try googling: migraine prophylaxis for a number of articles/POVs.

Also, I think it's worthwhile to find a migraine specialist - not just a neurologist or headache specialist - but one whose practice is limited solely to migraines. Finding the exact cause/reason can go a long way in finding the right/better meds (and possibly treatment/cure, though it's still rare). I suffered for many years and many neurologists until finding the "migraine guy" in my area. He was able to dx the type and cause of my migraines quickly, and while they're not "cured", they're substantially less than they were.

Doc