Tramadol
"I've RLS for more than a decade. Its hereditary. My respected mother also suffered from it. 
From last one year it became too intensive to sleep. Requip and other drugs for RLS my neurologist gave didn't work on me. My orthopedic gave me Tramadol for lower backache. SURPRISE!! My legs stopped jumping that night. Since then I'm on it. Unfortunately it doesn't cure it so I've to take it one pill 50mg every night. Dr said Tramadol is habit forming so Now I'm trying alternative medicine like homeopathy and Ayurved. Let's see. Meanwhile thanks to Tramadol that's letting me sleep."