Zolpidem
"I love zolpidem, it works great for me. I've been using it about 4 times a week for 9 months and so far I haven't had any tolerance or loss of effectiveness.  I'm asleep within 30 minutes after taking it, every time. I have noticed that it makes me drowsy for a while the next day (not as bad as Tylenol PM or Unisom can).  There has also been a couple times when I have woken up in the middle of the night and done weird stuff that I don't remember, which is kind of scary. Overall though it has been a God send."