Hallucinogen Persisting Perception Disorder (HPPD)
According to the American Psychiatric Association's DSM-IV-TR (2000), the "essential feature" of Hallucinogen Persisting Perception Disorder (HPPD) is "...the transient recurrence of disturbances in perception that are reminiscent of those experienced during one or more earlier Hallucinogen Intoxications."
What The Experts Say:
Henry Abraham , M.D. Interview
Research:
Hallucinogen Persisting Perception Disorder: what do we know after 50 years?
