Your patient is a 32 year old male who is having signs and symptoms of an inhalation. The most common inhaled poison is: Poisoning and Overdose Emergencies Your patient is a 32 year old male who is having signs and symptoms of an inhalation. The most common inhaled poison is: A. carbon dioxide B. nitrogen C. carbon monoxide D. phosgene Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+