I was on
Dopamax Topamax for about eight months. I got up to a dosage of 400mg per day, with no relief of my migraines, but plenty of temporary brain damage problems. My memory went kaput, I couldn't finish a sentence, etc..., so I finally bailed, even though other people were getting help from this med.
Anyway, there are two key things to remember if you are taking Topamax and it is working for you - 1) Drink plenty of beverages, especially water, continuously every day. Keep the plumbing constantly in use. 2) Avoid calcium rich foods and suppliments in excess, the major component of a kidney stone is Calcium.
I have kidneys known for making boulders, not stones. A couple of years ago I had one that was so huge, it got impacted and had to be surgically removed. No ultrasound blasting for me, I got the full Roto-Router method. I wouldn't wish that on anyone. Apparently, it is actually more painful than giving birth (I'm spawn free so I'm taking this on advise from others.)
Let me know how things work out for you.