During an opioid overdose, the brain betrays the body. A single event—be it a rush of heroin or fentanyl or a semisynthetic prescription painkiller like oxycodone—sets off a series of repercussions: The drug travels from the bloodstream to the brain; it latches itself to opioid receptors; it suppresses the brain’s ability to control breathing rate; it blurs the brain’s recognition of dangerous carbon dioxide levels in the bloodstream; it causes the brain to cross wires in its communication with the diaphragm; and, finally, the drug causes failure in the lungs to breathe in and out as normal. The drug suffocates its user, systemically. 

The suffocating tendrils of addiction reach wide…