I was on Tramadol for 4 years before being switched to stronger medicines. How long have you been taking the Tramadol?
My doctor replaced 1/2 of my daily Tramadol dose with Vicodin and I continued that for a year. I did get very uncomfortable withdrawal symptoms from the Tramadol when that switch was made. However...
My doctor a year later completely took me off the Tramadol and replaced it with Morphine ER with Percocet for break through pain and I had no withdrawal symptoms from stopping the Tramadol at all!!! By the way, when I stopped the Tramadol completely, I was taking the same amount as you per day.
The amount of Fentanyl you are on is stronger than the starting dose of Morphine that I was on when I stopped taking Tramadol. And, the fentanyl dose is much much stronger than the Tramadol so I don't think you should get any withdrawal symptoms.
I would just try to not take it anymore and see how it goes. But first and foremost make sure your doctor is okay with this.
Thanks so much Femmy I will be seeing my doctor tomorrow and discuss your comments.