Hallucinogen persisting perception disorder

Rare card · No. 74268

Hallucinogen persisting perception disorder (HPPD) is a non-psychotic disorder in which a person experiences lasting or persistent visual hallucinations or perceptual distortions after using drugs such as psychedelics, dissociatives, deliriants, entactogens, and cannabinoids. Symptoms may include visual snow, trails and after images (palinopsia), light fractals on flat surfaces, intensified colors, altered motion perception, pareidolia, micropsia, and macropsia. Floaters and visual snow may occur in other conditions. For the diagnosis, other psychological, psychiatric, and neurological conditions must be ruled out, and they must cause distress in everyday life. In the DSM-5 it is diagnostic code 292.89 (F16.983). In the ICD-10, the diagnosis code F16.7 corresponds most closely. It is rarely recognized by hallucinogen users and psychiatrists, and is differentiated from hallucinogen-induced psychotic disorder in that it does not involve paranoia, insomnia, changes in thinking, or delusions...

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