I have been on Diladid 8 mg 4xdaily for several months now, and not much relief. (2 fractured discs in thorasic region) As of today, I have been prescribed Fentanyl patches, 75's I believe, the script is in my car... My question is, which brand is the best? I've heard that some fall off, and some don't work as well as the other. When I researched a few months ago, I found Costco to be the cheapest, however, is it the best brand? Also, best prices? Thanks in advance.