Every time I'd forget or talk myself out of taking it (self denial). It would take 2 days off for it to start, 3rd day it would get bad enough I'd have to restart it. About 4-6 hours after I restarted the Gaba, the withdrawal symptoms would stop. When I finally got to doc to take me off of it, I was in the psych ward, and they had me on some other med to ease the withdrawal. I have no idea what it was because I was pretty "relaxed" with the meds I was on while in the ward.
The Gabapentin didn't really do anything for me that I noticed, that's why I tried so hard, for so long to get the doc to take me off of it. The only thing I noticed was the withdrawal symptoms. I was on it for both a psych med (anxiety), and pain relief from Fibromyalgia (or so they said).