Naloxone reverses an opioid overdose by knocking opioids off the brain’s receptors, restoring breathing within two to five minutes. The most common form is a pre-loaded nasal spray (sold as Narcan and generics) that requires no medical training to use. Here’s exactly what to do, step by step, if you ever need it.
Recognizing an Opioid Overdose
Before reaching for naloxone, you need to know what you’re looking at. The classic signs form what clinicians call the “opioid overdose triad”: pinpoint pupils, slowed or stopped breathing, and unresponsiveness. Breathing may be extremely shallow, sometimes dropping to just four to six breaths per minute (normal is 12 to 20). The person’s skin may turn bluish or grayish, especially around the lips and fingertips, because oxygen levels are falling.
Other signs include gurgling or snoring sounds, limpness, and skin that looks flushed or feels clammy. If someone won’t wake up when you shout their name or rub your knuckles hard on their breastbone, treat it as an overdose. Acting on a wrong guess carries almost no risk. Naloxone has no effect on someone who doesn’t have opioids in their system.
Using the Nasal Spray
The nasal spray is the version most people will encounter. Each device holds a single 4 mg dose and is designed to be used once. Do not prime or test it beforehand, as that will waste the dose.
- Step 1: Lay the person flat on their back.
- Step 2: Peel open the packaging and remove the device.
- Step 3: Support the back of the person’s neck with one hand so their head tilts slightly back.
- Step 4: Insert the tip of the nozzle into one nostril until your fingers rest against the bottom of their nose.
- Step 5: Press the plunger firmly. This delivers the full dose in a single spray.
- Step 6: Remove the nozzle from the nostril.
That’s it. The device does the rest. Call 911 immediately if you haven’t already, then move the person into the recovery position (more on that below).
Using Injectable Naloxone
Some naloxone kits come with a vial or pre-filled syringe instead of a nasal spray. The injection goes into a large muscle, typically the outer thigh, and can be given right through clothing. If your kit includes a separate vial and syringe, you’ll need to draw the medication into the syringe first. Kits that include these components usually come with brief assembly instructions. An auto-injector version works similarly to an EpiPen: press it firmly against the outer thigh and hold it in place until the dose is delivered.
If you’re choosing which form to keep on hand, the nasal spray is simpler for untrained bystanders because there’s no assembly and no needle.
If the Person Doesn’t Wake Up
Naloxone typically starts working within two to three minutes, but a single dose doesn’t always do the job, especially with potent synthetic opioids like fentanyl. The CDC recommends waiting two to three minutes after the first dose. If normal breathing hasn’t returned, give a second dose in the other nostril using a new device.
While you wait for the naloxone to take effect or for paramedics to arrive, give rescue breaths if the person isn’t breathing on their own. Tilt their head back to open the airway, pinch their nose closed, seal your mouth over theirs, and deliver one breath every five seconds. Watch for the chest to rise with each breath. Continue until the person starts breathing again or help arrives.
The Recovery Position
Once the person is breathing, roll them onto their side. This prevents choking if they vomit, which is common as the naloxone takes effect. Here’s how to do it:
Kneel beside the person. Take the arm closest to you and extend it straight out at a right angle, palm facing up. Fold their other arm across their body so the back of that hand rests against the cheek nearest you and hold it there. With your free hand, bend the person’s far knee to a right angle, then pull that bent knee toward you to roll them onto their side. Their top leg should stay bent to keep them stable. Gently tilt their head back to keep the airway open.
What Happens After Naloxone Works
When naloxone kicks in, it strips opioids from the brain’s receptors all at once. This can throw the person into immediate withdrawal. Expect them to be confused, agitated, nauseous, or combative. A racing heartbeat is the most common reaction, occurring in roughly 80% of cases where withdrawal is triggered. Vomiting is also common, which is why the recovery position matters so much.
The person may not understand what happened and might be angry or frightened. Stay calm, explain that they overdosed, and keep them from using more opioids. Using again while naloxone is still active can trigger another overdose once the naloxone wears off.
Why You Can’t Skip the ER
Naloxone wears off faster than most opioids do. Its effects last roughly 30 to 80 minutes, while many opioids, particularly fentanyl, methadone, and long-acting painkillers, stay active in the body for hours. This means a person can slip back into overdose after the naloxone fades. Medical guidelines call for monitoring overdose patients for 6 to 12 hours after naloxone administration. Emergency medical care is not optional, even if the person looks fine and wants to leave.
Storing Naloxone
Keep naloxone at room temperature, out of direct sunlight, and away from extreme heat or cold. The nasal spray has a shelf life of three to four years depending on when it was manufactured (the FDA recently extended it from three years to four for newly produced Narcan). Always check the expiration date printed on the package. If your naloxone is expired and it’s all you have during an emergency, use it anyway. Expired naloxone may lose some potency, but some is better than none.
Legal Protections for Bystanders
Forty-seven states plus Washington, D.C. have both Good Samaritan laws and naloxone access laws on the books. These laws generally protect you from prosecution for drug-related offenses when you call 911 to report an overdose, and they shield you from liability when you administer naloxone in good faith. The specifics vary by state (some provide immunity from arrest, others from prosecution), but the broad message is consistent: the legal system is designed to encourage you to act, not punish you for helping.
Naloxone is available without a prescription at most pharmacies in the United States. Many community organizations and health departments also distribute it for free. If you or someone in your life uses opioids, whether prescribed or not, keeping a dose within reach is a straightforward precaution that costs little and could prevent a death.