I've been on 600 mgs of gabapentin for 14 years. Was at 1200 mgs for the first few. I read the literature. The negatives are not at bad as they sound. First, they were only observed in rats. Second, the reduction in synapse genesis was just a reduction, not a stoppage. Third, the vast majority of synapse genesis happens in the first 5 years of life. There is very little happening in adults.

You will likely suffer much greater damage from seizures than from a reduced synapse genesis.

*administrative edit* There have been similar postings about SSRI's and just about every other med. There are negatives about Tylenol/acetaminophen, one of the most trusted meds on the planet. .