Dextromethorphan breaks through the blood-brain barrier. It is a
harmful intoxicant which causes severe damage to the brain and
psychosis. It should be illegal.
For more information, search "Dextromethorphan induced
psychosis" online.
Dextromethorphan- Induced Psychosis
epcms.com/uploadedFiles/vol32num3a1.pdf
Dextromethorphan- Induced Mania
psy.psychiatryonline.org/cgi/reprint/37/1/71.pdf