I find the fentanyl / opioid crisis heartbreaking and compounds like this intriguing... it's something of a consolation that people like you are busy trying to minimize harm just like being involved with drug HR in general soothes some of the more desperate sides of using a lot of drugs.
Are you saying this compound could actually be used responsibly as prophylaxis against resp depression? I don't know that it is financially realistic to expect people to be able to afford taking an extra drug constantly when getting high. If only used in case of emergency I would have to agree that narcan and similar opioid antagonists should suffice. Do they though? Because the pharmacological competition with superpotent opioids might make it less efficacious, no? Do they have to give fent users multiple shots, I thought I remembered something like that.
Also I would worry that addicts simply take their high and level of dependency just one or more steps further if a drug like this is considered a failsafe, plus is it even totally reliable? But hey it's good to investigate ways to reduce harm and deaths regardless of such obstacles.
If someone would have a brilliant model how big pharma and the govt would profit from distributing something like this after a bit more research about the safety and way to use, maybe this could be good. I would look at something like bupe as an example perhaps but I really don't know much about such matters, is just what my gut suspects.
It's sad it's gotta be like that but you probably have to tickle the interest of those big players like the pharma industry and the state even if you despise them.