If someone has been poisoned, call the Poison Help line at 1-800-222-1222 immediately. This free, 24/7 line connects you to your local poison control center from anywhere in the United States. The steps you take in the first few minutes depend on how the poison entered the body: through swallowing, breathing, skin contact, or eye exposure. Acting quickly and correctly can make the difference between a minor scare and a life-threatening emergency.
First Steps Based on Type of Exposure
Poisoning isn’t one-size-fits-all. The right response depends entirely on how the person came into contact with the toxic substance.
Swallowed poison: Call Poison Help (1-800-222-1222) right away. Do not try to make the person vomit. Have the container or label nearby so you can describe exactly what was swallowed, how much, and when.
Inhaled poison: Get the person to fresh air immediately. If they’re in an enclosed space with fumes, gas, or smoke, move them outside or to a ventilated area before doing anything else. Then call Poison Help.
Poison on the skin: Remove any clothing the substance touched. Rinse the affected skin under running water for 15 to 20 minutes. Don’t scrub, just let the water flow over the area continuously.
Chemical in the eye: Flush the eye with clean, lukewarm tap water for at least 20 minutes. Hold the eyelid open and let water run across the eye from the inner corner outward. Contact Poison Help or seek emergency care afterward.
What Not to Do During a Poisoning
Some of the most common instincts during a poisoning emergency are actually harmful. The biggest one: do not make the person vomit. For decades, a medication called syrup of ipecac was kept in home medicine cabinets for exactly this purpose. That advice is now firmly outdated. The American Academy of Clinical Toxicology issued a position statement recommending against its routine use, and a 2013 update reinforced that there is no convincing evidence ipecac improves outcomes for poisoned patients.
Why? Vomiting is unpredictable. It removes only a small and variable amount of the swallowed substance, and the amount recovered decreases the longer you wait. Worse, vomiting can cause serious harm if the person swallowed something caustic like drain cleaner or bleach, because the chemical burns the throat a second time on the way back up. It can also delay treatments that actually work, like activated charcoal or specific antidotes.
Other things to avoid: don’t give the person milk, bread, or salt water unless specifically instructed by poison control. Don’t try to “neutralize” an acid with a base or vice versa. And never wait to see if symptoms develop before calling for help.
How Activated Charcoal Works
Activated charcoal is one of the most effective tools for treating swallowed poisons, but timing is everything. It works by binding to the toxic substance in the stomach and intestines, preventing your body from absorbing it. The charcoal and the toxin then pass through your system together without entering your bloodstream.
For activated charcoal to be effective, it generally needs to be given within one hour of swallowing the poison. After that window, most of the substance has already moved deeper into the digestive tract where charcoal can’t reach it. There are exceptions: large ingestions, delayed-release medications, and substances that slow digestion (like opioids) may still benefit from charcoal given up to four hours later.
This is a treatment administered under medical guidance, not something to self-prescribe at home. The dose depends on how much of the toxic substance was swallowed, and getting it wrong can cause complications. If poison control tells you to go to the emergency room, activated charcoal is one of the first things the medical team will consider.
How Hospitals Treat Specific Poisons
Some poisons have specific antidotes that directly counteract the toxic effects. These aren’t available at home, but knowing they exist can be reassuring if you or someone you know ends up in emergency care.
Opioid overdoses are reversed with a medication that blocks the drug’s effect on the brain. It works within minutes and can be given as a nasal spray or injection. Because opioids suppress breathing, this antidote is literally lifesaving, and many states now make it available without a prescription for people at risk.
Acetaminophen (Tylenol) overdose is treated with a medication that protects the liver from damage. Acetaminophen poisoning is particularly dangerous because symptoms may not appear for 24 to 72 hours, by which point serious liver injury is already underway. This is why calling poison control matters even when the person feels fine. Treatment is most effective when started early.
Heavy metal poisoning from substances like lead, mercury, or arsenic is treated with chelation therapy. The medication binds to the metal in your bloodstream and helps your kidneys filter it out. This process typically takes days to weeks depending on the severity.
Carbon monoxide poisoning is treated with pure oxygen. Breathing normal air, it takes roughly five hours for your body to clear half the carbon monoxide from your blood. Breathing 100% oxygen cuts that time to about 75 minutes. In severe cases involving unconsciousness, heart problems, or pregnancy, a hyperbaric oxygen chamber can reduce it to around 20 minutes. This treatment is most effective when started within six hours of exposure.
Recognizing Poisoning Symptoms
Poisoning doesn’t always look dramatic. Symptoms vary widely depending on the substance, and some of the most dangerous poisons produce subtle early signs that are easy to dismiss.
Opioid poisoning causes extreme drowsiness, pinpoint pupils, and slow or shallow breathing. It can progress to unconsciousness, dangerously low blood pressure, and fluid in the lungs. If someone is unresponsive with very small pupils and barely breathing, opioid poisoning is a strong possibility.
Stimulant poisoning (from substances like methamphetamine or cocaine) looks like the opposite: rapid heart rate, high blood pressure, elevated body temperature, sweating, enlarged pupils, agitation, and in severe cases, seizures.
Pesticide or nerve agent exposure triggers what’s sometimes called a “wet” response: excessive salivation, tearing, sweating, diarrhea, and urination, along with muscle twitching and weakness. Small pupils, confusion, and seizures can follow.
Carbon monoxide is one of the trickiest because it’s odorless and colorless. Symptoms start with headache, nausea, and dizziness, which many people mistake for the flu. As exposure continues, confusion, loss of consciousness, and heart rhythm problems develop.
Snake Bites and Venom
Venomous snake bites are a form of poisoning that requires their own set of rules. The only first aid technique with evidence supporting its effectiveness against venom spread is the pressure immobilization technique. This involves wrapping a firm bandage around the bitten limb (tight enough to compress the tissue but not tight enough to cut off blood flow like a tourniquet) and keeping the limb completely still.
Forget everything you’ve seen in movies. Cutting the wound, sucking out the venom, and applying a tourniquet are all ineffective and potentially harmful. A systematic review of snake bite first aid found that tourniquets provided no benefit and actually worsened local symptoms at the bite site. Incision and suction were equally useless. Oral suction also risks exposing the rescuer to the venom. The only definitive treatment for a venomous snake bite is antivenom administered at a hospital.
Preventing Poisoning at Home
Most poisoning emergencies, especially those involving children, are preventable. Unintentional poisoning deaths in children under five increased about 53% in recent years, largely driven by narcotics and psychiatric medications that were left within reach.
The highest-risk items in a typical home fall into a few categories:
- Medications: Store all drugs in a locked cabinet or box, in their original child-resistant containers. This includes over-the-counter painkillers, vitamins, and supplements.
- Laundry detergent packets: Their bright colors and squishy texture attract young children. Keep them in their original containers, stored out of sight and reach.
- Cleaning supplies: Bleach, drain cleaner, oven cleaner, and similar products belong in a locked cabinet. Never transfer them to food or drink containers.
- Button batteries: Small, shiny, and extremely dangerous if swallowed. A single button battery lodged in a child’s throat can cause severe burns within two hours. Keep products with accessible battery compartments away from children.
Post the Poison Help number (1-800-222-1222) on your refrigerator and save it in your phone. In a real emergency, the seconds spent searching for it matter.