Overdose prevention sites, also known as supervised injection facilities, offer a clean, safe environment in which people can inject drugs they have purchased elsewhere under the supervision of medical staff, who act much like lifeguards do at a swimming pool. Staff members are always on the scene and armed with naloxone, which they can readily administer if needed so no overdose becomes a fatality.
https://www.statnews.com/2019/04/05/overdose-prevention-sites-save-lives/
By Thomas Farley
The Collected Works of Jim Garrow 