I have avascular necrosis which has cut off bloodflow in my bone joints. My Dr prescribed fentanyl 25mmg after I told him the norco 5/325 wasn't enough for the pain. Been on it for 3 months and i've decided to get off it after informing myself. My Dr prescribed norco 7.5/325 for pain. My question is can I quit fentanyl 25 coldturkey or is my Dr bullshitting me, my body is too weak for withdrawals. I've been fooled before by the medical profession. I would appreciate any comments.