hallucinogen persisting perception disorder
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Substance abuse An involuntary recurrence of some aspect of a hallucinatory experience or perceptual distortion often with negative overtones and accompanied by fear and anxiety; flashbacks are an adverse effect classically associated with psychedelic drugs—e.g., LSD and PCP—which occur days to weeks after the last dose; flashbacks are common in heavy users and disappear with time
hallucinogen persisting perception disorder,
Distorted sensory experiences (usually hallucinatory visual perceptions) that occur in those with a long history of illicit drug use.
Hallucinogen persisting perception disorder (HPPD)
The recurrence of LSD effects after the drug experience has ended.
Mentioned in: Lysergic Acid Diethylamide (LSD)