I tried to look for the question you posted here, and really did not find much, other than sites saying the side effect will vary and the length as well with some of them.
WOW!...there are a lot of possible side effects with this med....so please read up on it as much as you can. I do have a friend at work that is on it, and he is happy with the results.
Other than that...it looks like you will have to wait for another member here to voice their wisdom on it. Sorry..I'm an oxycodone patient.
Have a good evening!