I have a question about Topamax, and I'm hoping someone with some experience or knowledge can help me.

I have been on Topamax for a couple of months (100 mg twice a day). I didn't think anything of it and haven't had any side effects from the medicine.

I had purchased a book about Peripheral Neuropathy on Amazon that I finished reading this afternoon. Included in the book was a chapter on treatments for neuropathy. The section that talked about Topamax talked about how Topamax has go through your kidneys. I wish I still had the book so I could copy the sentence word for word, but I am letting a friend borrow it to read up on neuropathy.

My question is this. I only have one good kidney. One kidney is only 15% functioning. I am not allowed to take things like aspirin, aleve, or ibuprofen because they will affect my kidney. My doctors don't want any damage done to my good kidney (obviously, neither do I). My question is--is Topamax bad for a person's kidneys? I looked it up online and found some websites that said that Topamax led to kidney failure. I also found websites that said taking Topamax could lead to kidney stones in some people. That's not an issue with me, at least not thus far. But I am wondering if I should be alerting my neurologist about my kidney problem and going off of Topamax. To my knowledge, it isn't helping anyway. Does anyone out there have any idea?