Ferrous sulfate
"I had Restless legs. It was so bad I couldn't sleep at night.  The original meds I was taking for it quit working all of a sudden.  I had been taking Pramipexole. My doc said there was nothing else she could do for me. I requested an appt. with a neurologist. He prescribed feosol. It worked like a charm. God bless him as I was in bad shape not being able to sleep and going to work the next day. If you GP can't help you always as for a specialist. I found Feosol at CVS Pharmacy. If you can't find it always ask the pharmacist. It is an OTC MED."