"i have been using the fentanyl patch for about 10 days now (50mcg), and it works very well. i also use norco 10/325 for breakthrough pain. i was previously on ms-contin 45mg/3 x per day with norco for breakthrough pain, and it didn&#039;t work half as good as the patch. i have adhesive arachnoiditis, and the fentanyl patch has been the only medicine that allows me to walk around the house.  i was bedridden otherwise.  the only issue i have with it is the medicine doesn&#039;t seem to last the whole 72 hrs, only about 64 hrs.  i place the patch on the side of my abdomen, where movement is minimal, and it seems to stay in place better than on my arm or anywhere else."