i suffer from daily headaches and about 20+ migraines per month and am currently on disability. i've been on several beta blockers - none have helped with my migraines. the side effects for the beta blockers are very minimal compared to most of the other meds they use for migraine prevention. if you have asthma, keep in mind that while on a beta blocker, if you have an acute asthma attack, you will not respond to epinephrine.
last year i was on topamax for several months. it made me feel sicker and very "fuzzy headed" and i also gained weight from it. i've been on very many "preventative migraine medications" over the past six years and have responded to none, except for bad side effects. i hope you have better luck.
if you don't have asthma, i'd recommend trying the beta blockers first. hope this helps.
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Beta blockers or topomax for migraines ? 
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