I have had lower back pain and severe pain in my legs for about 2 years. About 3 months ago it started to be more constant so I went to my Doctor and he prescribed Percocet and flexaril(sorry about the spelling)...The Flexaril did not help at all, so he decided to try me on neurotin I have been on that for about a month. I am having severe mood swings and I always feel tired. Is this a side effect of Neurontin? I also take Soma just started taking that, and I take percocet. He said that I should stay on the neurontin, but I think that it is making me crazy! Can anyone help me out with this. I have looked online and I am coming up short. I would really appreciate it. Thanks in advance!