This is Dr. David
it sounds like he is having withdraw symptoms from tapering down too fast on his fentanyl patch.
fentanyl patches are a very very slow acting narcotic
tapering over one week is too quick.
each patch usually stays on for 3 days.
his withdraw symptoms could last 1-2 weeks, sometimes longer.
he has been on patches for 1 year
so his taper schedule should have been much slower.
a better taper scheduled would have been to take 1-2 weeks to drop down from each dose.
let me know if you have other questions.