Andrew Huberman· PhD
There is one paper that is a case series of individuals reporting these symptoms, and they didn't limit it to just people who had had hallucinogen history. And the amazing thing about this, is that a number of people seem to have straight up HPPD diagnosis. - What is HPPD? - Hallucinogen-persisting perceptual disorder, who have never taken a psychedelic. So it's often prompted by alcohol, benzodiazepines, cannabis, even tobacco.