> Take-home fentanyl is probably unnecessary

Nah, a friend and colleague needed fentanyl lollipops at one point. You'd be at lunch and he's like "Oh I can't eat food, they had to remove my entire stomach" sucking on the lollipop, and he'd calmly explain that you mustn't touch his weird lollipop because while he can suck on it for a normal person the dose from doing so would be fatal, he'd just used so many strong painkillers for so long that it was now necessary because the painkillers they give regular people did nothing.

Weaned himself off eventually too. Amazing willpower, probably related to why he's not dead.