I found this interesting article while reading DM online ( I know I shouldn't but the showbiz gossip is my light relief!).
dailymail.co.uk/health/arti...
It is a nasal spray recently approved by the FDA to treat resistant depression. It works by blocking excess Glutamate production in the brain.
As excess Glutamate is implicated in RLS it may be a possible future treatment. Let's hope the RLS experts are looking into it and perhaps considering trials.