I have been taking Neurontin since January 2008 with a gradual in...

I have been taking Neurontin since January 2008 with a gradual increase from 300 mg to 900mg daily. I am having several of the side effects especially since the increase to the 900mg. Sleepy, constipation, burning eyes, pain on my left side, probably the kidney area. I was put on the medicine for a pinched nerve in my back which was causing pain in my left leg. It seems to be easing but I don't like the side effects. Will they gradually go away? Hope to receive some response from others. J