--and welcome to NeuroTalk.

There are a couple of places here that it might be a good idea to visit and converse on--the Celiac/Gluten Sensitivity forum is one:

http://neurotalk.psychcentral.com/forumdisplay.php?f=13

I'd pay particular attention to The Gluten File in the Useful Websites section there; it's an enormous database about the subject, including the neurological effects of gluten sensitivity, which includes seizures.

Of course, the Epilepsy board would also be a good place to visit:

http://neurotalk.psychcentral.com/fo...sprune=-1&f=11


--as would the Peripheral Neuropathy board, where there are many people who can speak to the side effects of anti-seizure drugs such as Lyrica (which is as often prescribed for neural pain as it is for seizures):

http://neurotalk.psychcentral.com/fo...sprune=-1&f=20

BTW, the side effects you describe are not at all unusual with both Gabapentin and Pregabalin--fluid retention and kidney effects are common. (That doctor needs to read a few more continuing medical education papers.)