I have severe neuropathy pain both feet and legs. I had been on norco 10-325 for 5 years before trying fentanyl I also take 800 mg x4gabapentin now after 6 weeks of fentanyl I want off. The fentanyl is not for me,for one thing it’s dangerous and messes my stomach up. Have I took it long enough to have serious withdrawals? What would be the best route to take and how serious would the withdrawals be? By the way I’m a 78 year old male.