Hi! I started taking gabapentin 200mg at night for hypnic jerks/insomnia and it has worked great. In fact, I slept all night for the first time in 20 months. I've noticed this week though that I have been having crazy mood swings, I get so upset so easily, or really energized. The only thing I can think of that could have caused this is the medication, but I don't know. Has anyone else experienced mood swings as a side effect of this drug? Is it even a possible side effect?