I think there are a few people who might disagree with that. I don't know of any other drug that has garnered two nicknames due to the "loopy" feelings it causes.

Google: stupamax
Google: dopamax

I openly admit to a bias against this drug; it's on the bottom of the list of any drug I would ever try or recommend, especially for PN:
That said, I'm SO glad it works well for SOMEBODY.

I'm having trouble finding the other information I was looking for; google seems to be clogged with lawsuit hype over Topamax's alleged causing of birth defects. Some can be found by googling: topamax worst drugs
(Admittedly negatively biased.)

Doc