I have never taken medication for RLS but I would really like to know what causes it? After reading posts here it seems that iron and other minerals may be part of the solution..but iron hasn't helped my RLS. Mine started when I was anaemic during pregnancy, was given iron injections but RLS never went away completely. It's worse after stress, tiredness, alcohol, caffeine and sugary drinks. But I don't have it every day. Sitting in the evenings watching TV, at the cinema etc , or on a long flight really triggers it for me. Keeping active, reading and listening to music help.
Finally, copper bracelets and occasional CBD oil at bedtime do help as well as herbal sleep aids such as Valerian.
Thank you for all the useful posts...at least I know that I'm not alone.