restless legs syndrome
"I was having violent nightmares, shaking and kicking violently throughout the night, once striking my wife. 
I had no recall of any of it in the morning and I felt rested. I did find that I could not make thru the day without a nap. If I napped in my recliner, there were no episodes, but if I lay down on the bed, I had episodes as soon as I dozed off.

Started ropinarole at .25mg, moving up to 1mg before any control of RLS was seen. Then no nightmares, shakes or kicking for about 6 months.
Episodes started up again growing progressively worse. Started 2mg but had episodes in the early mornings. Started taking med. at 30 minutes before bedtime instead of 1 to 2 hours before. So far, no episodes."