restless legs syndrome
"I really had  been suffering this complex and less studied disorder which can seriously affect your efficacy. Fortunately I shifted to a country were no good COX-2 inhibitors were available for my on and off back pain so I was given tramadol 50mg twice daily. Once I took a cap after 2 hours I find my legs quite fine and sensation free, which I used to have for a decade on and off  "