I have to agree wih doggboy. Cymbalta is an SNRI and can be a bit more energizing than other AD medications, thus I think it may be better to take in the morning.
I was on cymbalta and my Doc said to take it in the morning due to it can cause insomnia, and my wife also was just started and they told her the same thing.
I dont take cymbalta but call your doc or your pharmicist and see what they recomend. I take my meds at night cause they help me sleep better. I am bi polar and I dont sleep when I am manic so call them and let me know what you find out.
Love Venora