Tramadol
restless legs syndrome
"I've suffered restless legs syndrome since 2nd grade. It is a miserable affliction. I am now 51 and I experience it in my legs, arms and back as restlessness and pain starting after 7pm. Initially was on ropinirole, pramipexole for a few years. Those pills made me feel sleepy until 3 am at which time I'd wake up. A sleep specialist now has me on 1200mg of gabapentin and 50mg tramadol. For me, this combination works great. It relieves 100% of the restlessness and 90% of the pain and other uncomfortable sensations.  
I've been able to fall asleep with this medicine combination. Glad it's available!"