Pain
"Very good medication for first couple months and then effectiveness reduced and I had to add back in Norco for break through pain because it did not last more than 3 or 4 hours and the max I could take was 4/day.  (100 mg) I did well as far as not feeling tired, it seemed to give me a zip of energy but when it wore off in the 3 or 4 hour, the anxiety was terrible.  I have trouble sleeping and for some reason Nucynta did not seem to aggravate this like Tramadol did. "