Must be what Dr. Dean was in to during the campaign.
Very interesting article, thank you for digging it out.
It does not say that hosaca induces schizophrenia, though; it does say that they find DMT in the urine of people who drink DMT beverages, and that they find it in schizophrenic urine also. You'd expect to find DMT in the urine of a hosaca drinker, he drank DMT. They are researching a theory that schizophrenia is caused by the brain demethylating an existing brain chemical into DMT, hence their interest in hosaca and ayahuasca. They looked for other chemicals in the hosaca drinker's urine, and either looked or planned to look for the same stuff in the schizophrenic's urine. It was surprising to see a reduction in serotonin levels, I would have expected an increase in serotonin when ingesting beta carbolines and substituted tryptamines.
The article mentions the transient nature of the experience- "rapid onset and brief duration", whereas schizophrenia as mentioned is persistent.
The psycomimetetic theory of hallucinogens like DMT has been dropped from most research, mostly because the hallucinogens' effect does not mimic psychosis, nor does the intoxicated state resemble schizophrenia. This research was performed before 1968, mostly; it is illegal to research it in the USA, which is probably why the work was performed in Argentina.
www.maps.org is a good source for current research.