Tried klonopin for a week. Made me groggy in the morning, hard to get out of bed, and drowsy all day. Also made me a little bit depressed. So I've stopped taking it. Waiting to see if the doctor wants to try something with a shorter half-life/duration of action, like ambien or xanax or lunesta. Not sure if any of those are at all effective for PLM. As always, will keep you informed.