Clonazepam
"MY RLS  came on  post op of a Total hip replacement .It was wicked . I would get up at 2 AM and go for a walk. I got stopped by the police.They would walk around the block with me until the symptoms went away. Went to my sleep neurologist  and she knew immediately what it was. RLS post op is triggered by low feratin levels and/or withdrawal from opiates (pain meds)  you need to have your Iron levels checked . I have found a walk late afternoon ,ie mowing the lawn helps . There  is stimulation pad made called Relaxis which does work . However it drives my wife nuts."