At those doses, I bet it does knock you out. I was using 150 mg of trazadone and it did not reliably knock me out. Now I use 2.5 mg of saphris and sleep like a rock. The really weird thing is I have forgotten to take it and slept okay. It's like it fixes the problem that was keeping me from sleeping. I am tempted to experiment with more than one night in a row or see if maybe every other night works.