What helps most with an overdose depends on the substance involved, but the single most important step in any overdose is calling 911 immediately. For opioid overdoses, naloxone (sold as Narcan) can reverse the effects within minutes. For other substances like alcohol, stimulants, or sedatives, there is no reversal drug, and emergency medical care is the primary lifeline. Here’s what actually works, broken down by situation.
The First Minutes: What Bystanders Can Do
If someone is unresponsive and breathing slowly or not at all, call 911 right away. You don’t need to know what they took. All you have to say is “someone is unresponsive and not breathing,” followed by your location. The dispatcher will walk you through next steps based on what you describe.
While waiting for help, check that nothing is blocking the person’s airway, like food or vomit. If they aren’t breathing on their own, rescue breathing can be lifesaving even without any medication. Tilt the head back, pinch the nose closed, seal your mouth over theirs, and give one breath every five seconds. Watch for the chest to rise. If you need to leave the person for any reason, roll them onto their side into the recovery position so they won’t choke if they vomit.
Do not try to make the person vomit, put them in a cold shower, or give them coffee. None of these help, and some can cause harm.
Naloxone for Opioid Overdoses
Naloxone is a medication that attaches to the same brain receptors as opioids and knocks the opioid molecules off. It can restore normal breathing within two minutes in someone whose breathing has slowed or stopped from heroin, fentanyl, oxycodone, or other opioids. It’s available as a nasal spray (Narcan) without a prescription at most pharmacies in the United States.
One dose is often enough, but fentanyl, which is now present in a large share of the illicit drug supply, frequently requires multiple doses. If the person doesn’t respond after the first dose, give a second dose after two to three minutes. Keep giving rescue breaths between doses.
A critical detail many people don’t realize: naloxone wears off faster than most opioids do. Its effects last roughly 30 to 90 minutes, while the opioid in the person’s system may still be active for hours. In clinical studies, volunteers who received naloxone for morphine sedation began feeling the morphine’s effects again within 15 to 30 minutes and returned to their pre-naloxone sedation level within 45 minutes. Surgical patients have needed additional naloxone anywhere from 30 minutes to 90 minutes after initial reversal. This means someone who seems fine after naloxone can slip back into overdose once it wears off. Stay with the person until paramedics arrive, and make sure they get to a hospital even if they appear to recover.
Alcohol Poisoning
There is no naloxone equivalent for alcohol. Treatment is entirely supportive: keeping the airway clear, preventing choking, and waiting for the body to process the alcohol. In the hospital, this typically means IV fluids to prevent dehydration, oxygen therapy, and vitamins and glucose to head off serious complications. For poisoning from methanol or isopropyl alcohol (found in industrial products, not drinks), dialysis can filter the toxin from the blood directly.
The biggest danger with alcohol poisoning is choking on vomit or breathing so slowly that the brain loses oxygen. If someone has passed out after heavy drinking and you can’t wake them, that’s a medical emergency. Roll them onto their side and call 911.
Stimulant Overdoses
Cocaine and methamphetamine overdoses look very different from opioid overdoses. Instead of slowed breathing and unconsciousness, you’ll typically see agitation, a racing heart, dangerously high body temperature, or seizures. There’s no reversal drug for stimulants.
In the emergency department, the priority is cooling the body and controlling agitation. Body temperature above 104°F can cause organ failure and needs to be brought down within 15 to 20 minutes. Medical teams use ice packs, evaporative cooling, and sometimes ice baths. Seizures and severe agitation are managed with sedatives. A calm, quiet environment helps. Physical restraints tend to make things worse by driving body temperature and agitation higher.
If you’re with someone experiencing a stimulant overdose, call 911, try to keep them calm, and move them to a cooler area if possible. Don’t try to hold them down.
Sedative and Pill Overdoses
Overdoses from benzodiazepines (like Xanax or Valium) do have a reversal agent called flumazenil, but it’s only used in hospitals under specific circumstances. For someone who takes benzodiazepines regularly, reversing the drug too quickly can trigger dangerous seizures. Because of this risk, doctors typically reserve it for cases where the person has no history of regular benzodiazepine use and hasn’t taken other drugs alongside it.
For pill overdoses caught early, hospitals sometimes use activated charcoal, which binds to many drugs in the stomach and prevents absorption. The catch is timing: it works best within the first hour after ingestion, and its effectiveness drops sharply after two hours. This is another reason calling 911 quickly matters so much.
Legal Protections for Calling 911
Fear of arrest stops many people from calling for help during an overdose. Most U.S. states now have Good Samaritan laws that protect both the person who calls 911 and the overdose victim from certain drug-related criminal charges. The specifics vary by state: some provide immunity from arrest, others protect you from prosecution after arrest. But the core principle is the same. Calling for help should not lead to criminal penalties for the people involved.
Preventing Overdose Before It Happens
Fentanyl test strips are an inexpensive harm reduction tool that can detect fentanyl in a drug sample in under five minutes. They were originally designed to test urine but have been repurposed to test drug residue dissolved in a small amount of water. Research published in JAMA Network Open found that people who use test strips tend to engage in a broader set of risk reduction behaviors, like testing the strength of drugs before using a full dose and having naloxone nearby.
Other practical steps that reduce overdose risk include never using alone, starting with a smaller amount when using a new batch of any substance, keeping naloxone accessible, and avoiding mixing opioids with alcohol or benzodiazepines. The combination of opioids with other sedating substances is one of the most common causes of fatal overdose because both suppress breathing through different pathways simultaneously.