This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages before signing in

Symptoms according to percentage carboxyhaemoglobin

Authoring team

There is a characteristic trend of symptoms according to the percentage of carboxyhaemoglobin in the blood:

  • 0-15% carboxyhaemoglobin: typically no symptoms
  • 15-20%:
    • headache
    • confusion
  • 20-40%:
    • nausea
    • fatigue
    • disorientation
    • irritability
  • 40-60%:
    • hallucinations
    • ataxia
    • syncope
    • convulsions
    • coma
  • > 60%: death

Create an account to add page annotations

Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page