Signs and symptoms of carbon monoxide poisoning may include:
Carbon monoxide poisoning can be especially dangerous for people who are sleeping or intoxicated. People may have irreversible brain damage or even be killed before anyone realizes there's a problem.
The warning signs of carbon monoxide poisoning can be subtle. But the condition is a life-threatening medical emergency. If you think you or someone you're with may have carbon monoxide poisoning, get into fresh air and seek emergency medical care.