I have stage 3 congestive heart failure. I have a bi ventricular pace maker with defibrillator. I fractured my hip and no one will operate due to my weak heart. I was on Oxycodone 30mg 4 or 5 a day for 15 months. I have been off them now for 4 months and dont want to deal with them again. My Dr. prescribed Fentanyl 50mcg patch every 48 hours. Any one know what I might expect?