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Dear Karen,
Thank you for your question. This sensation of "sleeping legs" can occur in MS, along with the numbness / tingling that you are mentioning. Since this is a new symptom, it would be better to rule out a circulatory problem, which your doctor can do easily by examining you, and ordering a few simple tests if necessary. Abnormal sensations can respond to Neurontin, but 600 mg per day is probably not enough to get a good effect. We also use other medications, such as Amitriptyline or Tegretol, for abnormal sensations. If the muscles of your legs get tight, performing stretching exercises in the morning and evening can help. It is important to monitor the evolution of your symptoms over time. They certainly fluctuate from day to day, but if you have a sense of overall worsening, it could be useful to be re-examined by your neurologist.
Decreased perspiration has been reported in MS, and is probably due to a dysfunction in a specific part of the nervous system.
I hope this helps.