Did you meant _aren't _ all the same? They're certainly similar, and fentanyl will satisfy the cravings of those addicted to other opiates, but compared to hero

Did you meant _aren't _ all the same? They're certainly similar, and fentanyl will satisfy the cravings of those addicted to other opiates, but compared to heroin/diacetylmorphine has a shorter duration of action and reportedly less euphoric/more sedative effects.