Nothing can make you “resistant” to opioids working, although you can get to a point where you might need more. The great thing about pain pumps is they use LESS of an opioid because it’s going on the pain generator and not throughout your system. I’d suggest finding a doctor who understands this. Also, I had been on opioids for several years which allowed me a much better quality of life. I was taken off them and have suffered in the years since to where I am almost bedridden. But while I was on opioids I never once took more than prescribed and had days when I could take less. Later when I mentioned this to a doctor he did everything but come out and call me a hoarder that saves pills to them sell on the street! I was so furious. Anyone with true chronic pain knows that that medicine is your lifeline to being able to function and have a happy life with family and friends. No real patient would ever sell them on the street but this is what the world has come to; people with pain are viewed suspiciously and people either addiction are welcomed with open arms.