Haven't heard of that one, but there is a Rescue Remedy Sleep version that may or may not be a help. And you've probably already tried these? - making sure there are only quiet activities for an hour before bedtime, routine story time just before sleep, not eating dinner too close to bedtime, choosing easy to digest food for dinner, maybe even one of those light show music toys. Not sure how old your DS is, but DD was a toss-and-turn baby and grew out of it, if that's any consolation!