"Excellent medication, only thing to work after twenty years of sleeplessness and trying everything.  Takes a few weeks to get used to it, the grogginess etc lift with time.  Use the weight gain as an excuse to exercise more, make it a win win situation.  I take 7.5mgs and take it two to three hours before bedtime, this way I wake up more refreshed, and some evenings I go without it just to give myself a break."