insomnia
"I have trouble sleeping from 3 - 6 am.  I wake up and cannot go back to sleep creating the daytime symptoms of insomnia (see: http://www.mayoclinic.org/diseases-conditions/insomnia/basics/definition/CON-20024293 ). I rarely have trouble falling asleep.

I have been taking LIQUID doxepin for 18+ months (along with a 5 mg time release melatonin) - 30 min before bedtime.  The LIQUID has to be especially prescribed by your Dr and approved by your drug company.  A 120 ml bottle is $79 - with medicare & drug co approval, my out of pocket (last bought in 6/2016) was $7! Much cheaper than Silenor.  I am prescribed 0.6ml/night, but sometimes I take 0.5ml or less, & never over 0.7ml (rarely).

Doxepin & melatonin work well to help me sleep from 10p-6a!"