My experiences with Neurontin were similar to others here. I was on 600mg a day for couple years and it really did help with fibromyalgia pain! The bad thing is I gained 25 pounds and could not get it off! Then I went down to 200mg and lost 12 pounds immediately so I know it caused my weight gain. Recently I took myself off it completely, wanted to try something else. Haven't lost anymore weight (girlscout cookies keep calling my name) but I have had significant tooth pain! I did not make the connection until a neighbor told me today about neurontin causing tooth pain and I believe it! Since on SSD for fibro I don't have dental insurance but the pain is pretty bad sometimes. I'm tempted to go on it again because nothing else, outside of hydrocodone, has worked on my pain. I'm too afraid of Lyrica so I don't know what I will do!