Hallucinogen Persisting Perception Disorder might be more common than thought

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Hallucinogen Persisting Perception Disorder might be more common than thought

 

"About 39.7% of the participants fell into the category of Type I HPPD, experiencing milder symptoms, while 4.3% were categorized as having Type II HPPD, indicating more severe and intrusive symptoms. The most commonly reported symptom was false perceptions of movement.

“The more severe type of HPPD (type II) appears to occur in around 4-5% of hallucinogen users, while fleeting and non-intrusive hallucinogenic experiences following hallucinogen use are more common,” Stone said. “We were surprised that such a large proportion of respondents (over 40%) reported at least some HPPD symptoms.”