I was on 1800mg of Gapapentin but it didn't work. Getting side effects coming off it gradually had last one today. I was highly anxious and shaking last two mornings. I asked two pharmacists who said it would be withdrawal symptoms. Anyway I am starting Pregabalin 100mg per day to start. Two weeks at that then increase dosage by GP. Not pleased at having to wait two weeks but that's how my GP operates.