Ingestion of SN by suicide can cause serious harm and irreversible consequences. It can lead to a condition called methemoglobinemia, in which the blood loses its ability to carry oxygen. This can cause symptoms such as cyanosis (blue discoloration of the skin), difficulty breathing and confusion. Organ damage: If not treated quickly, methemoglobinemia can lead to permanent damage to organs, including the brain, heart, and kidneys, due to lack of oxygen. Loss of consciousness: Due to the severity of the poisoning, a person can lose consciousness in less than 20 minutes. Feeling of paralysis: Although a person may lose consciousness, it is not common to experience a feeling of paralysis similar to locked-in syndrome. Locked-in syndrome occurs when a person is aware but completely paralyzed, usually due to damage to the brainstem, not typically associated with acute sodium nitrite poisoning. Neurological damage: If poisoning is severe and prolonged, permanent neurological damage may occur, which can affect cognitive, motor and behavioral function.