Why is carbon monoxide poisoning dangerous? It has no taste, odor, color, but it is very toxic to the body! Such poisonings mostly occur in case of malfunctioning furnace heating or fires inside closed rooms. Once in the body, CO blocks the formation of ATP, which leads to tissue hypoxia and energy shortages. Carbon monoxide then binds with hemoglobin to form carboxyhemoglobin, which cannot carry oxygen, another cause of hypoxia. It primarily affects the organs that are sensitive to hypoxia - the brain and the heart. Therefore, CO poisoning manifests as headache, dizziness, nausea, vomiting, impaired coordination of movements. And in severe cases - loss of consciousness, coma, death.