Oh yeah for sure fentanyl is totally safe for medical use, its not any more dangerous than any other opioid on the order of its effect. What makes it so dangerous its high potency, medical professionals can easily dose out the required amount, but thats a lot harder on the street.
I'm a bit of an exception to the rule but fentanyl is my problem drug, I actually prefer it to heroin... though I know if we only had heroin on the street that would be better for society as a whole.
Do You IV?
Edit; my drug career is over, I’ve done fentanyl a dozen times or so, but I was always curious about carfentanil