ICD-11 · 6C49

Disorders due to use of hallucinogens

Mental and behavioral disorders resulting from the use of hallucinogens (LSD, psilocybin, mescaline, PCP), including intoxication, hallucinogen persisting perception disorder (HPPD), and hallucinogen-induced psychosis.

Symptoms

Hallucinogen intoxication (perceptual distortions, synesthesia) (also: LSD intoxication, psilocybin effects, perceptual distortions from hallucinogens, visual distortions, hallucinogen trip)
Visual hallucinations and illusions (also: visual hallucinations from LSD, psychedelic visuals, seeing colors or shapes, geometric patterns, seeing auras)
Feelings of derealisation and depersonalisation (also: derealisation on psychedelics, feeling unreal after hallucinogens, depersonalisation during trip, ego dissolution, sense of unreality)
Hallucinogen persisting perception disorder (flashbacks) (also: HPPD, flashbacks after LSD, persisting visual disturbances, lingering perceptual effects, visual snow after hallucinogens)
Severe anxiety or panic during intoxication (bad trip) (also: bad trip, panic during psychedelic experience, anxiety on LSD, overwhelming fear during trip, psychedelic panic attack)
Hallucinogen-induced psychosis (also: hallucinogen-induced psychosis, psychosis from LSD, hallucinogen-induced delusional disorder, post-hallucinogen psychosis)

Synonyms and related terms

LSD intoxication, psilocybin effects, perceptual distortions from hallucinogens, visual distortions, hallucinogen trip, visual hallucinations from LSD, psychedelic visuals, seeing colors or shapes, geometric patterns, seeing auras, derealisation on psychedelics, feeling unreal after hallucinogens, depersonalisation during trip, ego dissolution, sense of unreality, HPPD, flashbacks after LSD, persisting visual disturbances, lingering perceptual effects, visual snow after hallucinogens, bad trip, panic during psychedelic experience, anxiety on LSD, overwhelming fear during trip, psychedelic panic attack, psychosis from LSD, hallucinogen-induced delusional disorder, post-hallucinogen psychosis

Frequently asked questions

What are the symptoms of Disorders due to use of hallucinogens?

Symptoms associated with Disorders due to use of hallucinogens (ICD-11 6C49) include: Hallucinogen intoxication (perceptual distortions, synesthesia), Visual hallucinations and illusions, Feelings of derealisation and depersonalisation, Hallucinogen persisting perception disorder (flashbacks), Severe anxiety or panic during intoxication (bad trip), Hallucinogen-induced psychosis.

WHO ICD-11 source

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Source: WHO ICD-11 (chapter 6 – Mental, behavioral and neurodevelopmental disorders). Used under CC BY-ND 3.0 IGO. ICD Diagnostica is not affiliated with or endorsed by WHO. Informational use only – does not replace clinical judgment.