I have been taking 3500mg of Neurontin for 3.5 years to reduce se...

I have been taking 3500mg of Neurontin for 3.5 years to reduce sever pain caused by cirvical disc degeneration (injury caused in severe car accident) Neurontin reduced the amount of pain and seems to reduce painful outburtsts of unvolentary movements & phantom numbness and pain. I am able to reduce the amount of daily pain-killers that I need to get through the day. I am currently questioning the relation with Neurontin and a liver problem recently discovered. Of course, blood tests indicate cholesterol, and blood sugar problems. Is there any documented relationship with the long term use of Neurontin and liver and/or kidney disorders? Thanks