My pharmacist told me that doctors can't prescribe Ambien after a certain age, can't remember what it was though. I have a px for 10 mg and I cut the pills in half. I use them very rarely as it's easy to build up a tolerance to it, but when I get home at 2 AM from a gig and have to be on the organ bench the next morning a half pill usually knocks me out within 15 minutes. Also have a px for Lunesta but that stuff doesn't seem to work as well plus it has a nasty aftertaste.
Other natural things I've tried are 5-HTP, Tryptophan, high dose melatonin, lavender essential oil, kava kava, and valerian root.