Here I am again with something for people to think about, do some research on, and go from there for themselves.
Ponder this - stress makes RLS worse. Those of us who have problems sleeping would do well to look up the 3 stages of stress - the Alarm Reaction, the Resistance Stage and finally the Exhaustion Stage. (This is well-documented from the model by Hans Selye.) I would bet that anyone who has continuous sleeping problems is in the Resistance stage, where cortisol is too high much of the day, and especially at night. BUT don't just read one description of Flight or Fight, read several, as some are more informative than others. Dr. James L. Wilson's book on 'Adrenal Fatigue on page 288 has a very good one.
Stress, especially those high cortisol levels in the resistance stage, makes RLS worse. Check out progressivehealth.com Stress and Restless Legs Syndrome.
Ponder that RLS makes stress worse, AND Stress makes RLS worse. Which came first, the chicken...etc? It becomes a vicious circle.
Check out pregnenolone - the grandmother hormone of the adrenal glands. Pregnenolone is the first hormone made in the Adrenal Cascade (made from cholesterol!) Other downstream hormones are made from pregnenolone -- whatever and as your body needs them. UNLESS you get caught out by "Pregnenolone Steal" where the pregnenolone is stolen to produce cortisol in (excess!) if your body/brain thinks you have a stressful situation -real or perceived - coming up. Cortisol can course thru your body in less than 1 minute when it is turned on. And if there are not enough of the downstream hormones to balance cortisol, then it continues.
So what hormones counteract cortisol? Pregnenolone and/or DHEA, especially. These are used in small quantities, by alternative doctors, for people who are suffering from adrenal problems (not recognized by mainstream medicine until they are at either end of the spectrum, either Addison's (can't make cortisol) or Cushing's (way too much cortisol.) But what about in between but still not normal? That's where alternative practices come in. One can look up various websites and get a lot of information that way, if one knows what to look for.
So, I suggest you do some of your own research on these ideas/ information/substances, etc. And look on Amazon, where there are people who have found these substances very helpful. Dhea is more controversial than pregnenolone, but do your own looking up and see what you come up with.
I'm throwing these ideas out for anyone who has not had relief and feels there are avenues not explored yet that might be helpful.