Doxepin
"I retired over 3 yrs. ago and almost immediately my schedule began to change, ending up in a situation in which I couldn't fall asleep sometimes until as late 5 or 6 am, and not get up until around noon!  Yesterday my lung doc, who also does sleep studies, suggested doxepin.  I had already had a bad experience with it many years ago - 10 mg. It put me to sleep alright, but I felt like a frigging zombie the next day .He told me that was too strong a dose and recommended half of that.  He also told me that most insurance companies won't pay for it in any dose except the generic 10 mg. capsule.  Not the 3mg. tablet or the liquid. So, I half the caps nightly in water. Slept fine;no hangover. Retired 11:30 & up @ 8.Hope tonight's same. Dose is key!"