Hi Im with Ada, topamax even though I too had major hair loss and thought it was the rsd until now, is the only med that controls my migraines which I never had prior to RSD. If I accidently forget my am or pm dose of topamax a migraine begins that is how effective topamax is for me. So if you are suffering with severe migraines, mine were sending me to the er reguarly, I would consider topamax even though the side effects can be severe. CZ