I have had a similar experience. I had a spinal fusion and could not take ibuprofen, which controlled my migraines. The neurologist put me on Topamax, as soon as I reached the prescribed dose I had a simple partial seizure. I have never had seizures before and now I have been diagnosed with epilepsy, after many more. I have mentioned this to a couple of doctors and they do not think there is a link. I have also had memory problems since then. There is a reason they call it "Dopamax".
I am a health care professional and have always gotten angry when other professionals do not look at the evidence and just want to believe what they want to believe. I had one very intelligent and competent emergency room nurse argue with me that Chantix did not cause anger or depression and that it was just whiney people finding a med to blame it on. Now they know it can cause these symptoms. They call people with fibromyalgia liars and say how they are psychiatric patients and are crazy. It drives me nuts! They call frequent migraine sufferers who go to the E.R. and beg for pain meds drug seekers (some actually are and you can doing them more harm by giving them pain meds, but it is so hard to differentiate).
Everybody is different and reacts to meds different, just because it is a miracle for one does not mean it can't be hell for another. You cannot go by your own experiences with a drug and say the same thing will happen to everyone.
I am back on ibuprofen for my migraines, I am very fortunate that 800 mg works for me (of course, I have ulcers). I can empathize with all of you that have had to try so many different meds and have not found relief. I do not know what I would do if I had to endure that. I hope you all find relief with the least amount of side effects.