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This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

Available on Amazon
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Carbon monoxide poisoning

Category: Events



Introduction and description

Carbon monoxide is a product of incomplete combustion of organic matter with insufficient oxygen supply to enable complete oxidation to carbon dioxide (CO2) and is often produced in domestic or industrial settings by motor vehicles and other gasoline-powered tools, heaters, and cooking equipment. Or as Confucius might have said

Man who run in
Front of car get tired.
Man who run behind
Car get exhausted.

Carbon monoxide is a toxic gas, but, being colorless, odorless, tasteless, and non-irritating, it is very difficult for people to detect. Exposures at 100 ppm or greater can be dangerous to human health. 

The main manifestations of poisoning develop in the organ systems most dependent on oxygen use, the central nervous system and the heart. The initial symptoms of acute carbon monoxide poisoning include headache, nausea, malaise, and fatigue. These symptoms are often mistaken for a virus such as influenza or other illnesses such as food poisoning or gastroenteritis.   Headache is the most common symptom of acute carbon monoxide poisoning; it is often described as dull, frontal, and continuous.


Increasing exposure produces cardiac abnormalities including fast heart rate, low blood pressure, and cardiac arrhythmia;  central nervous system symptoms include delirium,  dizziness, unsteady gait, confusion, seizures, and central nervous system depression. 

 And hallucinations.

 Carbon monoxide poisoning can cause changes in perception of the visual and auditory system and was recognised as a possible explanation for haunted houses as early as 1921

How it works

Any experiences a person get at the time of poisoning are as a result of hypoxia, and asphyxiation, however, long term, the experiences are probably attributable to the brain damage that results from exposure.  So if it doesn’t get you at the time, it may get you longer term!

References and further reading

There are other papers on PubMed that cover sources of carbon monoxide poisoning that are quite interesting

Related observations