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Oct 22, 2021

Ed Prideaux joins us to discuss what Hallucinogen Perception Persisting Disorder (HPPD) is, its symptoms, its history, its association with other mental health conditions, how widespread it seems to be, and how it isn’t necessarily a negative experience.

We also speak of psychedelic flashbacks--what they are and what they are not; the role of memory, trauma, and neuroplasticity in HPPD; the pathologizing of neurodiversity; and each of our personal experiences of the condition.


For links to Prideaux's work, full show notes, and to watch this episode in video, head to
***Full Topics Breakdown Below***
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Episode Breakdown
  • What is Hallucinogen Perception Persisting Disorder?
  • James’ personal experiences of HPPD
  • HPPD is much more common than we realize, and not always negative
  • The potentially serious negative consequences of HPPD
  • The harm of drug stigma, cultural ignorance, and pathologizing of neurodiversity
  • The urgency of HPPD
  • The pharmacological treatments for HPPD
  • Psychedelic flashbacks: what they are, and what they are not
  • HPPD is not necessary the consequence of psychedelics
  • Genetic predispositions to HPPD
  • Memory triggers, Neruoplastiocity and being traumatized by psychedelics (bad trips)
  • HPPD can be positive, too
  • The current treatments for HPPD
  • The relationship between Cannabis and HPPD
  • Something everyone should know about HPPD
  • Why do people who don't have HPPD think it’s not real?
  • How to create better awareness around Hallucinogen Perception Persisting Disorder
  • Links to Ed Prideaux’s Twitter, The Perception Restoration Foundation, and some Australia studies happening now/soon

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