Many years ago a doctor in Belgium gave me magnesium (Promagnor 450) in powder form for RLS. It was fantastic. As magnesium is very important in many body functions I take half a sachet every day for a week and then have a week off. I very rarely suffer at all but if I find in an evening that if I start to get painful legs I immediately take half a sachet and the relief is almost immediate. Unfortunately I can't find the powder form in any pharmacy in the UK so I order it online, as I don't find magnesium tablets as effective.