insomnia
"I suffer with sleep duration insomnia. Mostly I fall asleep naturally for two hours then perhaps drop off naturally once more for an hour; after that I wake and cannot fall asleep without zolpidem. 



The insomnia seems to be caused by general anxiety and a mind that will not stop holding internal conversations even when I am exhausted. I take 1/4 x10mg zolpidem which at best gives three hours sleep; I repeat this at least once over the night. It's been like this for some years with no side effects, tolerance, addiction or rebound insomnia noticeable. Overall this is the best sedative for me as it leaves no drowsiness the next day. My wish would be for a longer sedative action."