As an expert in toxicology, I can provide information on the effects of carbon monoxide (CO) poisoning. Carbon monoxide is a colorless, odorless, and tasteless gas that can be lethal if inhaled in significant quantities. It binds to hemoglobin in the blood more effectively than oxygen, reducing the blood's capacity to carry oxygen. This can lead to tissue and organ damage, particularly to the heart and brain. The experience of dying from CO poisoning can vary depending on the level of exposure and the individual's health condition. In some cases, high levels of CO can cause swift unconsciousness, which may lead to a painless death. However, the initial moments of realizing that one is not breathing in air can potentially cause some brief panic. It's important to note that the symptoms can be deceptive, as they often mimic those of less serious conditions like the flu, leading to a delay in seeking help. read more >>

Carbon monoxide (CO) poisoning. ... However, CO can be highly toxic if the concentration is high enough. It is also odourless and tasteless and will cause reasonably swift unconsciousness leading to a peaceful and painless death, although there may be some brief panic knowing that the body is not breathing in air.read more >>