Hi there ~
There are deaddiction centers that helps with addiction to narcotics and other drugs. If you can find the right psychiatrist
he/she might be able to guide you through the process. I am sure it will be challenging but your willingness to go off of the medication though you have been having it for 4-5 years is what matters. I hope this helps and good luck with recovery. You've talked the talk, now walk the walk.
I hope this helped. Take care and have a good day !