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  1. Research - Actively Recruiting

    1. Research Advertisements

      The approved advertisement will be listed here for all approved research.

  2. Main Forums




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

    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.

    4. Symptoms: Descriptions, Discussion, Debate

      What are the symptoms? What do you feel encompasses HPPD?

    5. Medications & Other Treatments

      The place to discuss pharmacological and other treatment options.

  3. Active and Future Research

    1. Research Articles, Publications and Studies

      Articles, publications and studies for review and discussion.

  4. Community Area

    1. Community Open Space

      This is a location to talk about anything except your symptoms. Be respectful of other users, but any topic within the rules are open for discussion.

    2. Forum Information, Questions and Suggestions

      Is the forum missing something? Do you have any ideas or suggestions? Any problems or questions? Post them here.

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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

    • Psychedelics may improve mental health by getting inside nerve cells   From this article I get that psychedelics are very powerful substances. DMT can reach inside a cell's interior. "“greasy” substances, like LSD, that easily pass through cells’ fatty outer layers resulted in neurons branching out." I'm going to try blessed thistle because it's been proven to regrow nerves.
    • Hi, I really don’t have anything helpful to say, but I’m so very sorry you are going through this and I am praying you will feel better. I was also wondering about mold. I’m convinced there’s black mold in this house we bought a couple of years ago (one half of a duplex.) My husband said there is no mold because we had an inspection done before we bought the place. We did have black mold in our prior rental house. There are days I don’t feel well and I was becoming fixated (obsessed) on the “mold” we supposedly don’t have. I have Chronic Fatigue Syndrome and it sucks so bad, on top of that I take like 6 different meds that have sedating side effects. I’ve been on Klonopin every single day for the past 14(?) years or so, which of course makes me even more tired but it is the ONLY thing that has ever helped my symptoms. To me it’s a miracle drug. Anyway, I meandered away from the actual thing I was trying to talk about (I do that all the time!) How do you test for mold or whatnot in your system? Besides that, as I said, I don’t really have anything helpful to say but I sincerely hope you start feeling better. (And I don’t mind reading novels because all my posts are novels too 🤣)
    • Though my symptoms have been worsened greatly over past 2 years due to a horrid acute situational crisis.  I'm hoping once I'm though it  I will be able to focus on my healing once again and things may return back to a baseline. 
  • 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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