I lost weight on topamax, however the side effects other than that good one my feet tingled uncontrollably it was really dustrbing... it was a tingle all the time and the higher the dose the worse it got. i think if you don't get that side effect you will be good with it. i wish i could still take it. oh, if you do take it make sure you take it just like the doctor orders as he will give you strict orders and go on them otherwise it will make you sick and dizzy.... that is one of those meds where you take maybe a pill for a couple days 1 time a day then you will take maybe one in the morning and one in the afternoon.. oh,if you have no insurance it is outrageously high!!!!