Hi I am currently getting migraines that have increased radically in the last six months to appox 5 a month,a have been taking a dose of topamax of 100mg a day for the last three years and on seeing a consultant recently he has suggested upping the dosage to 400mg. I have upped it gradually to 200mg a day but can see nowhere on any forum that anyone seems to be taking this much for migraines, any suggestions? Thanks