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    2. MAIN AND GENERAL FORUM

      This is the catch-all forum for posts. Discuss anything related to Hallucinogen Persisting Perception Disorder (HPPD) here.

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    3. Introductions

      A place to introduce yourself to the community and what you hope to seek out on this site. New members may share their experience and onset of HPPD and what drug(s) triggered it.

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  • Hallucinogen Persisting Perception Disorder (HPPD) support forum - HPPD, flashbacks, drug-induced visual snow syndrome and depersonalization/derealization.

    Common HPPD symptoms: visual snow, palinopsia (trails/afterimages), increased BFEP, increased floaters, ghosting, halos, starbursts, macropsia/micropsia, geometric hallucinations, closed-eye visuals, flashbacks, depersonalization/derealization, anxiety, depression, brain fog, cognitive dysfunction, tinnitus.

  • Recently Active Topics

  • Latest Posts

    • Maybe there is a way to cure or treat HPPD by replicating what happens in the brain during mania without actually inducing full blown mania? 🤔 Functional neuroanatomy of mania
    • Very interesting and the first time I heard of it. I remember watching this schizophrenic on YouTube who also had HPPD and he never mentioned that and he would say he could tell the difference between his schizophrenic hallucinations and HPPD pseudohallucinations.
    • Hi John, that's an interesting observation and one i'd never heard of before. I can only assume certain chemicals are being released during those episodes that help with visuals, (Gaba?). Hopefully some of the more scientifically minded posters can add their thoughts.
  • Recent Status Updates

    • Spartan

      "hurt people hurt people"
      · 0 replies
    • thequestioner827  »  David S. Kozin

      Hi David, I was wondering if you had a full text version of the paper you posted here:
      I have university access to PubMed and Medline but I'm still unable to find a full-text version, only an abstract like what is posted here.
      Thanks in advance!
      · 0 replies
    • since92  »  David S. Kozin

      Hi Dave, I see in your profile pic one of your original posts from 1999, then I see that you joined this one in 2010.  Is it possible to see posts from the forum that we all used to message on - I'm presuming that you and I were on the same one forum?   It's because another user and I are looking for people we messaged with back in 2003 but I think though that I had a different user name in those days.  Do you know of that forum and whether we can access posts from those days?  I would like to see those early posts of mine because they had a lot of info about how my HPPD developed etc..  Many thanks.
      · 0 replies
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