Quetiapine
"Having been diagnosed with primary chronic insomnia at the age of 13, I have spent my life dealing with the condition.  After serving for 20 years of active duty I found that my condition worsened as time went on.  Now, in my mid-40’s, my condition has come to the point where, without medication, I can, and do, stay awake for 3-4 days on end without difficulty.  Using quetiapine in combination with another medication had turned out to be the only combination that gives me 6-8 hours of solid sleep.  I take 100mg along with my other med and within an hour I am tired enough to go to sleep.  I have had nights where the combination had no effect, but there have been only a dozen or so in the last 5 years"