Hi everybody, Has anyone been on Lyrica? Any side effect? I had been on Neurontin 600mg, 3 times/days. I gradually discontinued Neurontin to switch to Lyrica. I was OK when I started to take one Lyrica a day but, when I started taking the second Lyrica, this is when the side effects started. Upset stomach, acidity plus it increased my fibromyalgia. It got so bad that I switched back to Neurontin. Even now being back on Neurontin, I don't feel well. My fatigue came back, sore neck and legs. I have an appointment today with my GP and will let you know what he will do.