My bff has back and knee and hip pain but was told she cannot take Percocet or Norco. Dr. has her on 78tramadol which is not working and she is walking the floors of her apt bldg. all night for relief. I was thinking perhaps Fentanyl patches with or without Cymbalta. She is 78, has diet controlled diabete and is relatively healthy and very vvery strict with her food intake and exercises every day. What do you think abut the meds I suggested?