I take it for IIH (idiopathic intracranial hypertension). I take 50mg twice a day, which I built up to over 6 weeks.
I believe I have some loss of appetite, but I have also been following the 5:2 / on weight loss plan anyway over the same period so this could be down to my own effort?
I do have tingling feet, a couple of times a day, but this is bearable.
The other things I consider as side effects is that I do believe I have a slight change in my ability to think clearly, process information quickly etc. I have had some strange instances of interpreting things oddly, looking at things and thinking they were something else, momentarily. Nothing alarming, it's quite amusing, not dangerous! And I'm told I am a little less guarded with some things I say. A little like when you are drunk, but not appearing drunk.
These changes are very real, I have been on topiramate twice now, and, for me, exactly the same thing has happened.