Symptoms of Carbon Monoxide Toxicity As a Function of the Blood Carboxyhemoglobin Level

Blood Carboxyhemoglobin Level (%)	Symptoms
<15–20	Headache Dizziness Occasional confusion
20–40	Nausea Vomiting Disorientation Visual impairment
40–60	Agitation Combativeness Hallucinations Coma Shock
>60	Death