I doubt that will help much. Get some Hylands Restfull Legs at Walgreens. Also,take some DMX in the form of cold tablets. I've read it really works. Some doctors have used it for this "off label" with good results.
Try Melatonin for sleep...start with 3 capsules.
Good luck~
Flexeril is a muscle relaxant thats often prescribed for muscle stiffness and pain. I have never heard of it for restless legs.