I am on 25 mg of Topamax and on day 5 of it. Very slightly dopey...

I am on 25 mg of Topamax and on day 5 of it. Very slightly dopey, but this does not disturb me. The stranger symptom is that I do get hungry and then eat and then experience a significant nausea. I had anticipated a loss of appetite or general malaise, but this seems to hit only after I eat. In turn, I have to really moderate what I eat, not because of a lack of interest but what will hit on the other side. So it would seem the opposite of what others are experiencing...anyone else have this symptom?