If you use the Mylan generic fentanyl
patch that looks like a clear piece of tape rather than the more common gel
pouch patch, you can slowly taper by cutting it. I am currently doing that with the approval of my doctor, as is another member here. If you decrease by about 12.5 mcg a month, it's not too terrible.
One of the biggest complaints with fentanyl withdrawal is the powerful hot flashes and cold sweats. It happens if you're either over- or under-medicated.