muscle spasm
"My Doctor prescribed me this medication due to the fact I could not sleep at night. He warned me that I would have vivid dreams, but I haven't really.  I really like this medication as I can sleep through the night for the first time in years.  The only draw back is that it knocks me out cold, and the next morning I am really stiff from not tossing and turning all night.  I can live with that."