Where can GOOD and accurate information be found regarding FENTANYL and how it relates to causing DEPRESSION. I have been on the Fentanyl for over 6 years and have hit a level of depression that i am no longer the same person. I am completely miserable and just dont seem to care about anything ... and that is NOT MY PERSONALITY! I used to be a very outgoing .. fun loving person..and now.. I dont even like me... where i can find info on this. please .. thank you in advance