Naloxone (brand name Narcan) reverses an opioid overdose in minutes by knocking opioids off the brain's receptors and restarting breathing. It is available over the counter without a prescription, it is safe — it does nothing to a person who has no opioids in them — and anyone near opioid use should carry it and know the three steps: spray, call 911, stay.
An opioid overdose kills by stopping breathing: the receptors that drive the breath get saturated and the signal fades. Naloxone is an antagonist — it binds to those same receptors without activating them, shoving the opioid molecules off and letting the breathing drive restart, usually within two to three minutes.
It wears off in thirty to ninety minutes — often sooner than the opioid does — which is why the person needs medical care even after they wake up: the overdose can return when the naloxone fades. It is a bridge to the hospital, not the whole rescue.
Overdoses are witnessed: someone else is usually there, and the difference between a funeral and a scare is often whether that someone has naloxone and knows it. If you love someone who uses opioids — in recovery or not — carry it. If you are in recovery from opioids, keep it where people can find it and tell them where it is. After a period of abstinence, tolerance drops, and a return at the old dose is one of the deadliest windows there is.
Fentanyl changed the arithmetic: it is strong, it is mixed into other supplies unpredictably, and multiple naloxone doses are sometimes needed. This is why 'just in case' is now the right posture for far more people than before.
Spray: one device, one nostril, press the plunger firmly. No assembly, no needle for the nasal version.
Call 911 immediately after — naloxone is temporary and the overdose can come back.
Stay: put them on their side (recovery position), watch their breathing, and give a second dose after two to three minutes if there is no response. Good Samaritan laws in most places protect you for calling.
Naloxone is available over the counter at pharmacies, free from many community programs, and listed at findtreatment.gov and local health departments.
Marrow puts crisis lines and harm-reduction guidance one tap away on every screen, because the app is never the thing that saves a life. People are.
If you are thinking of ending your life, or you are not safe where you are, stop reading and reach a person instead. These lines are free, confidential, and answered at any hour.