Trazodone
"I was diagnosed with insomnia after I underwent extensive chemotherapy and was put on every other sleep aid known (Ambien, Lunesta, Edular, Intermezzo, etc.). After having a horrible side effect from Ambien which sent me to the hospital for numerous days, I was given Trazodone 25mg a night to take. I have the best results from it.  When I need it, it responds great with no problems the following morning."