Symptoms of CO Poisoning

Symptoms of Carbon Monoxide Poisoning

Early symptoms of Carbon Monoxide (CO) poisoning can mimic many common ailments and may easily be confused with food poisoning, viral infections, flu or simple tiredness.

Symptoms to look out for include:

  • Headache
  • Nausea
  • Breathlessness
  • Dizziness
  • Collapse
  • Unconsciousness

If you or your family experience any of the above symptoms and you believe CO may be involved, you must seek urgent medical advice from either your GP or an accident and emergency department. You should ask for a blood or breath test to confirm the presence of CO. Be aware, CO quickly leaves the blood and tests may be inaccurate if taken more than four hours after exposure has ceased.

In a medical emergency, don’t delay – call 999 for an ambulance.

  • If you receive medical attention, be sure to state that you suspect Carbon Monoxide poisoning to ensure you receive appropriate treatment, such as a breath or blood test.
  • Have all appliances checked by a qualified engineer before reusing.

Detailed health information for carbon monoxide is available from the Public Health Agency. Visit or contact them on 028 9031 1611.

Preventative Measures.