Preparing for an appointment

If you or someone you're with develops signs or symptoms of carbon monoxide poisoning — headache, dizziness, nausea, shortness of breath, weakness, confusion — get into fresh air immediately and call 911 or emergency medical help.

Hospital staff will need critical information as soon as you arrive. On the way to the hospital, try to prepare to answer questions about:

• Possible sources of carbon monoxide exposure
• Signs or symptoms, and when they started
• Any mental impairment, including confusion and memory problems
• Any loss of consciousness
• Other medical conditions with which the affected person has been diagnosed, including pregnancy
• Smoking habits