I take 12,000 mg of gabapentin a day (30 400mg) for chronic neck and back pain I use to take 2,400 mg/day in the states. I moved last year from the US and over here once you get the prescription you can stop in any pharmacy as many times as you like. (This is not true with my oxy where the prescription is taken every time until you get another one, I DO take this as prescribed because I've heard of horror stories of addictive to this med) On the net In their studies they found less than 1% of subjects that showed any signs of increased liver enzymes. Does anyone know more about gabapentin and liver function?