There are roughly five and a half fucktillion extracanonical gospels out there. For the first couple centuries after Jesus bit it, his followers wrote a ridiculous amount of fanfic.
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While not a recreational user I was on a fentanyl patch for several months and was put on Oxycontin to wean off. Even then it was very difficult. Best way I can describe fentanyl withdrawal is the hook/chain things from Hellraiser, but they're attached to your core.