Sorry, but I have another question! I sometimes wake up feeling hot/flushed with a fast pulse rate, usually it's from a dream after a couple of hours - from REM sleep I'm guessing. Anyone, else experience this? My heart beat returns to normal but it's disconcerting. At first I thought it was the valerien I'd taken but I remember I've had it with Nytol too... could it be my bed I wonder, it's a memory foam one.