I am on generic Zoloft, 175 mg. I had to try several meds before I found this, which works so well for me. I was on Cymbalta, and had exactly the symptoms you prescribe...waking up in the middle of the night...every night. Everyone told me to "give it time," but when I called and talked to my psychiatrists receptionist, she had me come in the next day.
I did not like Cymbalta at all, in fact I remember sitting in my car and looking out at the neighborhood, and thinking "I hate the world".