do you wait to see if the fentanyl works?? i used it once(at a low dose) and all it did was make me vomit and rock back and forth on the couch for an hour then passed out for 2 hrs. woke up with just as much pain.. my friend uses them along with methadone and dalordid(?) she is recovering from diambera(?) and back fussions along with many other ailments(for over 15 yrs now) she goes to a pain clinic in nyc... i have enough problems with vommitting and dizziness...do these effects go away quickly or does it take a long time for the meds to help thru the side-effects?? i know there is no quick fix for this nightmare..13 yrs of my life has been filled with so much pain,doctors and frustration...linda