"nucynta has worked very well for all my aches and pain, from the most severe to those i didn&#039;t even know i had.  at first, it did make me groggy which was a problem, but i kept taking it anyway because it did take away most of my pain.  after a couple of months of use, it takes away my pain, just like it did at the beginning, but i no longer feel sleepy.  i feel energetic, happier and am able very active because i hardly feel any pain.  i highly recommend it, but you do have to give it a chance because once your body adapts to it, the adverse effects far outweigh the benefits."