Should I go to the hospital if I was exposed to carbon monoxide?

Author: Shyanne Bailey IV  |  Last update: Tuesday, August 19, 2025

Go immediately to your local emergency department if you think you or someone with you has been exposed to carbon monoxide and the symptoms suggest high levels. Your house will also need to be checked for safety before anyone returns.

What do I do if I was exposed to carbon monoxide?

Immediately go outside to get fresh air, and right away call Poison Help (1-800-222-1222), which connects you to your local poison center. If you feel better when you are out of your home and worse when you return, CO may be present. If you notice this, call 911. Have the fire department check for CO in your house.

Should you go to sleep after being exposed to carbon monoxide?

Carbon monoxide is dangerous because a person may not recognize drowsiness as a symptom of poisoning. Consequently, someone with mild poisoning can go to sleep and continue to breathe the carbon monoxide until severe poisoning or death occurs.

Can you recover from carbon monoxide poisoning on your own?

If you have a mild case of CO poisoning, you'll feel better just by going outside and breathing fresh air. More severe cases may require treatment with pure oxygen or hyperbaric oxygen therapy (HBOT).

What are the initial symptoms of exposure to carbon monoxide?

Symptoms of carbon monoxide poisoning may include:
  • Breathing problems, including no breathing, shortness of breath, or rapid breathing.
  • Chest pain (may occur suddenly in people with angina)
  • Coma.
  • Confusion.
  • Convulsions.
  • Dizziness.
  • Drowsiness.
  • Fainting.

Carbon Monoxide Poisoning: Everything You Need to Know

How do hospitals treat carbon monoxide poisoning?

It involves breathing pure oxygen in a chamber for a set amount of time. The air pressure in the chamber is 2 to 3 times higher than usual. This helps replace carbon monoxide with oxygen in the blood. Hyperbaric oxygen therapy might be used for severe carbon monoxide poisoning.

How to clear carbon monoxide from a house?

If no one is feeling symptoms, ventilate the home with fresh air, turn off all potential sources of CO - your oil or gas furnace, gas water heater, gas range and oven, gas dryer, gas or kerosene space heater and any vehicle or small engine.

What to do if you inhale toxic fumes?

Treatment for inhalation exposures
  1. Ventilate the area. Open the windows and turn on the fan.
  2. Leave the area and get fresh air. Fresh air may resolve many uncomfortable symptoms.
  3. Treat the symptoms that are not alleviated by the fresh air:

Can your body get rid of carbon monoxide?

This means that, in four to five hours, half of the carbon monoxide bound to hemoglobin will be replaced with oxygen. At normal atmospheric pressures, but breathing 100 percent oxygen, the half-life for the elimination of carbon monoxide from the body is 50 to 70 minutes.

How do you treat minor carbon monoxide poisoning?

How is carbon monoxide poisoning treated? The best treatment is oxygen therapy. Breathing pure oxygen can bring the oxygen level in the blood back to normal.

Will opening a window help with carbon monoxide?

Opening windows helps the carbon monoxide quickly leave your home (as does opening doors). However, don't leave your exit path when getting out during this emergency to open as many windows as you can. Only open those that are along the way as you leave your home safely.

Can you test yourself for carbon monoxide poisoning?

Diagnosing Carbon Monoxide Poisoning. There isn't a self-diagnosis option for carbon monoxide poisoning. Symptoms may include: Headache and nausea.

Can urgent care test for carbon monoxide poisoning?

The answer is no. Carbon monoxide poisoning is a potentially deadly emergency. Stopping by a nearby urgent care or prompt care can waste precious time. Go to the emergency department of a hospital if you suspect carbon monoxide poisoning.

Is it safe to sleep after being exposed to carbon monoxide?

Yes, carbon monoxide poisoning can be fatal. If you inhale a lot of CO fumes, it can be deadly within minutes of entering your body. Get to fresh air and call emergency services if you suspect you have CO exposure or poisoning. A person who's sleeping can sometimes die before experiencing any symptoms.

Does the fire department charge to check for carbon monoxide?

In most areas, the fire department does not charge to respond to carbon monoxide alarms or to check for the presence of CO in a residence. However, policies can vary depending on the jurisdiction or specific fire department. It's always a good idea to contact your local fire department for specifics on their policies.

What to do if a carbon monoxide alarm goes off and then stops?

If you have a carbon monoxide detector chirping and then it stops, it's important to take the situation seriously, even if the alarm is no longer sounding. Even if the alarm has stopped, get everyone out of the home to a place with fresh air.

Does fresh air get rid of carbon monoxide?

Its half-life is approximately four hours in the fresh air. The treatment for severe carbon monoxide inhalation is using oxygen or hyperbaric chambers to minimize the CO in your system, which you will need to do at a hospital.

What are two warning signs of carbon monoxide poisoning?

The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO, it can make you pass out or kill you.

How to test for carbon monoxide without a detector?

Any of the following could be a sign of a carbon monoxide leak:
  1. Floppy yellow or orange flame on your gas hob or oven, rather than a crisp blue flame.
  2. Dark, sooty staining on or around gas appliances.
  3. Pilot lights that frequently blow out.
  4. Increased condensation inside windows.

How to clear lungs after inhaling fumes?

If you have inhaled chemical or toxic fumes, you should:
  1. get fresh air straight away — open doors and windows wide.
  2. loosen tight clothing.
  3. get urgent care if your condition worsens.

When should you go to ER for chemical inhalation?

Chemical Inhalation:

If experiencing extreme pain or difficulty breathing, get medical care as soon as possible! If the affected person is unconscious, move the exposed person to fresh air at once, if safe to do so, and request emergency medical assistance (call 911 or tell someone to call for you).

How long does carbon monoxide stay in the blood?

Moreover, due to the fact that carbon monoxide binds to blood cells in lieu of oxygen, it will take up to 120 days for the cells to die off and expel the carbon monoxide from your body. This means the negative effects carbon monoxide has on your body can linger for nearly a third of a year.

Does opening windows reduce carbon monoxide?

Keep windows and doors open slightly. If you suspect that CO is escaping into your home, open a window or a door. Opening windows and doors can significantly decrease CO levels.

How long does it take to get sick from carbon dioxide poisoning?

If you're exposed to low levels, it can take up to two hours to show symptoms of carbon monoxide poisoning. At higher levels, the process can take about five minutes.

What to do if carbon monoxide is detected in your house?

Call your emergency services (fire department or 911). Immediately move to fresh air - outdoors or by an open door or window. Do a head count to check that all persons are accounted for.

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