Answer:
No, it isn't. Carbon monoxide is carbon bonded to one oxygen atom, but carbon dioxide has two oxygen atoms. Unlike carbon dioxide, carbon monoxide is toxic, because it reacts with hemoglobin when inhaled and dissolved into the bloodstream. Carboxyhaemoglobin, the reaction's product, has a permanent bond between the 2 reactants, reducing hemoglobin's efficiency in carrying O2, and the person would feel suffocated or the need to breathe.