pain
"I was only on Nucynta for 2 days.  50 mg tabs x 3 times a day. I have been taking tramadol with no problems, but thought this might work better, as tramadol does not always control my pain.

I must be very sensitive, as this medicine on day 1 made me feel as if my body were speeding, but tired and loopy at the same time. 
Day 2 was more of the same, but I needed a higher dose in order to control a pain level of 7 that comes upon me as the day wears on.  I decided I did not want to go to 100mg because of my sensitivity to this medicine."