Topamax migraine side effectsTopamax (topiramate): Treatment for Migraine Prevention; Topamax: Treatment for EpilepsyLearn more about Topamax, one of only four drugs approved by the FDA for the prevention of Migraines. If you get a migraine headache, treat it as directed by your doctor (e. . Side effects, dosage, and other information on Topamax. in mid-sentence, insomnia, amenorrhoea (stopped menstruating), no difference in frequency of migraines or headaches: I had high hopes for Topamax, bu... more