I am not sure your current status but this kind of medication, you have to step up slowly as well as step down slowly if you are going to ween off. I have been on Gapapentin for my visual vertigo and nystagmus for 5 years. Recently, I tried to ween off very slowly from 1200mg per day to nothing. Unfortunately, @ 600mg when I started to get imbalancing problems and dizzyness. When I attempted to increase to 1600 (the full prescription), I had night blindness.
I have to step up to 1200mg again for optimum affect which I am stepping up slowing again.