Faces of HPPD
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Infographic of Survey Results:

faces_of_hppd_infographic_-_lewis.pdf
File Size: 604 kb
File Type: pdf
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Update 6/11/2019 - The article has been published:
Lewis, DM, Faces of HPPD: Hallucinogen Persisting Perception Disorder Patient Survey Results and a Descriptive Analysis of Patient Demographics, Medical Background, Drug Use History, Symptoms, and Treatments.  Addictive Disorders and their Treatment. Forthcoming 2019. 

Update 3/16/2019 - The manuscript was submitted to a respectable peer-reviewed journal focused on drug disorders.  If accepted, it will be approximately 3 months until publishing.  I will update this website as soon as information is known.


Data Collection for the HPPD Survey has been completed
as of December 30, 2017.  
A hundred thousand thank yous to the folks who partook in the survey to help foster knowledge about HPPD.
​It has taken years to collect data from a rather small population of HPPD patients.

​Stay tuned.  Be well.

Copyright 2013. Doreen Lewis, PhD
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