If you've already called, the rest of this page explains what you're seeing, what happens next, and what to do once they're safe. If you haven't called and any of the signs below are present, do that first — this will still be here.
Signs of Cocaine Overdose
Cocaine overdose doesn't look like the sedated, slowed-down picture most people have of an overdose. It's the opposite: an over-revved system, and the danger comes from the strain [1].
Heart and chest
Chest pain, a racing or irregular heartbeat, or a heartbeat that feels wrong. Cocaine can cause heart attack and dangerous rhythm disturbances even in young people with healthy hearts.
Temperature
Very high body temperature, hot skin, heavy sweating or a sudden stop in sweating. Severe overheating is one of the main ways stimulant overdose kills and needs hospital cooling.
Brain and nervous system
Seizures, severe confusion or agitation, extreme paranoia, a crushing headache, weakness on one side, slurred speech, or trouble seeing — some of these are stroke signs.
Breathing and consciousness
Trouble breathing, very fast or irregular breathing, unresponsiveness, or collapse. If breathing is slow or has stopped, an opioid may also be involved.
You don't need several of these. Chest pain alone is enough. A seizure alone is enough. And there's no amount that's known to be safe — cardiac events and seizures have occurred in first-time users and in young people with no known heart condition.
What to Do While You Wait
Stay with them. Keep the room cool and quiet, and take off extra layers — body temperature is one of the things most likely to kill, and a crowded, loud, or physically restraining situation pushes it higher. If they're unresponsive but breathing, put them on their side. If breathing has stopped and you know CPR, start it and tell the dispatcher.
Some things not to do, because they circulate as advice and are wrong: don't put someone in an ice bath — controlled cooling is a hospital procedure and improvised versions can cause serious harm. Don't give alcohol, more stimulants, or any other drug to "balance it out." Don't let them sleep it off unobserved. And don't wait to see whether it passes; someone who appears to be settling can deteriorate.
Why Naloxone, Even for Cocaine
Naloxone does nothing to cocaine. Give it anyway if you have it, for one reason: fentanyl now appears routinely in samples sold as cocaine [3], and nearly 70% of stimulant-involved overdose deaths in 2023 also involved it [2]. The person may have taken an opioid without knowing.
Naloxone causes no harm when no opioid is present [4], and it's available over the counter. Slow, shallow, or stopped breathing in particular points toward opioid involvement — that's not the usual cocaine picture. More than one dose may be needed.
What Happens at the Hospital
There's no antidote for cocaine the way naloxone reverses opioids. Emergency treatment is supportive and it works: lowering body temperature, protecting the heart and monitoring its rhythm, stopping seizures, controlling agitation, and managing blood pressure. Speed matters because the damage accrues while the strain continues.
Tell staff everything that was taken, including alcohol and any other drugs, and including anything you're unsure about. Nobody is trying to build a case — it changes what they treat and what they avoid.
Once they're safe
This part is for later — after the emergency, not during it. An overdose is frequently the moment a family learns how serious things had become, and the days afterward are disorienting for everyone involved.
When you get there: cocaine addiction treatment and medically supervised care are both here, and where use sits alongside depression, anxiety, or trauma we treat them together. If you're the person who made the call and don't know what to do now, our Families & Loved Ones team talks to people in exactly this position — and can verify their insurance on their behalf.
One practical thing worth doing regardless: keep naloxone in the house. It's over the counter, it doesn't expire quickly, and it costs nothing to have and not need.
FAQs
- What are the signs of a cocaine overdose?
- Chest pain, a racing or irregular heartbeat, very high body temperature, seizures, severe agitation or paranoia, difficulty breathing, stroke symptoms such as weakness on one side or slurred speech, and unresponsiveness. Call 911 immediately if you see any of these.
- Is there an antidote for cocaine overdose?
- No. Unlike opioid overdose, there is no reversal agent for cocaine itself. Hospital treatment is supportive — controlling body temperature, protecting the heart, stopping seizures, and managing agitation. This is why getting someone to emergency care quickly matters so much: time is the treatment.
- Should I give naloxone if I think it is a cocaine overdose?
- Yes, if it is available. Naloxone does nothing for cocaine, but fentanyl now turns up routinely in the stimulant supply, and naloxone causes no harm if no opioid is present. If breathing is slow, shallow, or stopped, give it and call 911. There is no downside to being wrong about this.
- Can you overdose on cocaine the first time you use it?
- Yes. There is no safe amount and no tolerance threshold that protects against cardiac events or seizures. Fatal outcomes have occurred in first-time users and in young people with no known heart condition.
- Will we get in trouble for calling 911?
- Most US states have Good Samaritan laws that provide protection from certain drug-possession charges for people who call for help during an overdose. Protections vary by state, but hesitating to call is the thing most likely to cost a life. Call.
- How long does a cocaine overdose last?
- There is no reliable timeframe, and waiting to see is dangerous. Cocaine acts fast and its serious complications — cardiac events, seizures, stroke, overheating — can develop within minutes. Someone who seems to be improving can still deteriorate, which is why medical assessment matters even if things appear to settle.
- What if I am not sure it is an overdose?
- Call anyway. Emergency dispatchers would far rather assess a situation that turns out to be fine than be called too late. You do not need to be certain, and you do not need to know what was taken.
Sources
- National Institute on Drug Abuse (NIDA). Cocaine.
- National Institute on Drug Abuse (NIDA). Drug Overdose Deaths: Facts and Figures.
- Centers for Disease Control and Prevention (CDC). Prevalence of Fentanyl in Methamphetamine and Cocaine Samples Collected by Community-Based Drug Checking Services.
- Substance Abuse and Mental Health Services Administration (SAMHSA). Naloxone.
This article is for informational purposes only and is not a substitute for emergency medical care. If you suspect an overdose, call 911.
Written by
Executive Director
Dominic Perry is a Licensed Clinical Social Worker (LCSW), Licensed Clinical Alcohol and Drug Counselor (LCADC), Master Addiction Counselor (MAC), and DOT Substance Abuse Professional (SAP) with approximately eight years of experience in behavioral health and substance use treatment. Dominic began his work with Virtue as a therapist at the Corbett residential facility before progressing into leadership, and now serves as Executive Director of Virtue Recovery Center – Outpatient in Las Vegas. He earned his Bachelor of Social Work from UNLV and his Master of Social Work from the University of Nevada Reno.
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