Synonyms: HPPD, 'flashbacks'
Hallucinogen persisting perception disorder (HPPD) is the recurrence of perceptive disturbances that firstly develop during hallucinogenic drug intoxication. The prevalence is low and it is more often diagnosed in those with a history of previous psychological issues or substance misuse, but it can arise in anyone, even after a single exposure to triggering drugs.
This is a companion discussion topic for the original article at https://patient.info/doctor/mental-health/hallucinogen-persisting-perception-disorder.htm