SciAm launches a new volley in the war on drugs – specifically an exotic plant known to some as “Psychotria.” On the street, it’s likely to be called “java” or “joe” and, according to a study in the journal Personality and Individual Differences, the popular, bitter brew can trigger hallucinations:
…[C]ollege students they studied said they sometimes heard faux voices after chugging at least seven cups of coffee daily.
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Some previous research has found that reducing or eliminating caffeinated coffee from the diets of schizophrenics reduces their hallucinations, but other studies haven’t replicated those findings, they note.