I miss BDD. OP, don't try to kite your pain meds. Call your doctor and tell them something is not working. If you have cancer, they will adjust your medicine if you explain how your pain hits you. I had cancer. Unless you have a horrible track record, they take care of you.
Now the flip side to op's question. First off, if I was withdrawaling off an opiate that is different but similar, I would use rudamentry math and figure out the conversion and taper off nice and easy. (that is not that complicated if you took opiates more than a few times. If I wasn't abusing my medicine, or simply got mixed up, or whatever just call your doctor and explain the situation. Otherwise there is a hint of bs in this thread. Enjoy the thread Bluelighters.
By the way, Bluelight is not a shlong sizing contest, but Harm Reduction forum.