I have been using Neurontin for about 6 months (300 mg/day--200 mg at night and 100 mg in the morning). It seems to have helped with my pain, at least somewhat. I have MS in addition to fibromyalgia, and when I saw my new neurologist yesterday, we discussed my medication. One of my biggest MS symptoms for the past 1-12 years has been segmental myoclonus. My legs, arms, trunk or head will jerk periodically. Sometimes it's just once in a great while, but sometimes I get a lot of jerks (sometimes close to 200 in an hour). Sometimes the jerks are minimal, but sometimes they've almost pulled me out of my chair. When I mentioned that I was taking Neurontin, my neuro mentioned that Neurontin can cause myoclonus. I can't really tell whether the Neurontin has made my myoclonus worse (I don't think it has), but I was wondering if others who take Neurontin have had myoclonus as a side effect. Do you find that since you started taking Neurontin, your arms, legs, head and/or trunk jerk? --Laura R.M.