the way the programme works is using established medications with well-understood mechanisms of action. Your reference to anecdotal evidence seems to disparage the programme and makes your call for a study look like a bad faith position.

Who cares about an argument on some random Internet forum? Doing a study and then publishing a paper on the efficacy of using Narcan to treat OUD would open up that treatment to more people, saving lives.

Perhaps you misunderstood me. I don't think this needs any further study because the drugs are already licensed and in use. Just needs publicity and for other places to adopt the treatment protocol.