Ive tried melatolin, gravel, zoplicon and a couple of other things like warm milk, bananas soft meditation music. Nothing worked for me. I am now on mirtazapine. I have learned that while most nights I get very little sleep due to itchiness or whatever, I can rest the next day. Eventually the sleep catches up for a couple of nights then I'm awake again for several more. I find not worrying about it helps the most.