I don't know if this is a possibility for you, but could you consider slowly weaning yourself off, decreasing the dose that you use, slowly but surely, over a period of days, weeks, months, whatever period of time it is that you need? You could decrease slowly enough that you don't even notice any withdrawal symptoms from a lower dose - though due to the significant willpower necessary to do this, it may not be possible. Then, perhaps, when you had reached a low enough dose that you do feel that you are actually ready to stop once-and-for-all, you could perhaps use opiates a day or two per week as an adjunct to quitting, just to stave off the accompanying depression and cravings, in order to keep yourself going strong.
This may not be feasible for you, personally, and I'm sorry if it isn't, I just thought that it was worth suggesting, just in case it helps a little bit.
This may not be feasible for you, personally, and I'm sorry if it isn't, I just thought that it was worth suggesting, just in case it helps a little bit.