Many moons ago I worked in a city ER. One Saturday morning a car pulled up to our ambulance doors. Several people pulled a newly-dead woman of the car, left her on the ground, and took off. It was the first time I saw narcan used. We somehow got her inside and placed an IV. I happened to be standing to her left when she came around. She sat bolt upright, suddenly, and grabbed my arm, screaming, "Bring me back! Bring me back!"

It was one of the most dramatic things I'd ever seen at that point. She was completely freaked out. I just told her, "You're ok. You're here with us now", etc. She knew she was gone. Somehow. She left a welt on my arm.
I've thought about that a lot as I've followed stories and discussions about our current drug crisis. I never saw that woman again, and don't know even what her situation was. But she was somone's daughter, maybe sister or mother; someone's friend. She had a problem. She needed help.
Opioids take over receptors on the hemoglobin molecule, a blood component that delivers oxygen to cells, and that can lead to respiratory depression, and respiratory arrest in some cases, followed then by cessation of activity in all other organs, then death. Narcan reverses that process; it essentially knocks the opiod off the hemoglobin molecule. If used quickly enough, breathing can resume.
I was quite surprised when I first learned that narcan was being used outside hospital or ambulance-type settings. But I also knew that we had an increasingly severe problem and many people were dying. It really hit home when it happened to a friend's son, who I knew to be a bright, handsome, engaging young man, with a promising future. One day I ran into his Dad, and was shocked to learn he'd been desperately trying to save his son's life for some time, essentially following him around and on three occasions, finding him overdosed, slumped over in his car near his drug den. My friend had kept this a secret, and was completely burnt out from trying to keep his son alive and get him help. He was almost to the point of giving up, he couldn't take it anymore. But, his son is alive to this day, and, last I heard, doing well, so his efforts paid off.
And I think that that is the idea behind some of these efforts, ie to keep the person alive so they can get help.
People don't much like drug addicts, and that's probably a lot of what's behind some of the dislike of these programs. I get that. People say it's a choice, and it usually is, the first time. Then it becomes a physical and psychological addiction.
Many of us know people addicted, even if we don't know we know them. These are our family, friends, neighbors, classmates, coworkers, employees, etc.
It's not a pretty issue to deal with, by any means. But I do think that getting help is a requirement for getting clean. Just things to think about when discussing this. It's everyone's problem because it affects all of us. Our friends and family members aren't immune. Hopefully, in understanding why this has happened, and making changes, we can help turn the tide. But it's definitely not going to be an easy fix.