"works okay for moderate pain. it does dry the mouth, eyes, etc. can be habit forming. i have experienced the insomnia and hallucinations. however, puts me in a better mood and gives me energy.  i think i am losing weight, too.  i&#039;ve been taking this for years on and off and i like it, but need something stronger for severe pain.  it works to take the edge off but as far as feeling free of pain nothing i&#039;ve taken seems to work 100%.  my back is just a mess, though.  narrowing spine, bone on bone rubbing, and calcified crack from years ago.  tramadol is a lifesaver if you prefer something lighter than oxycontin etc. i guess it&#039;s an individual preference."