6C49.3

ICD-11 MMS 2026-01

Hallucinogen intoxication

Description

Hallucinogen intoxication is a clinically significant transient condition that develops during or shortly after the consumption of hallucinogens that is characterised by disturbances in consciousness, cognition, perception, affect, behaviour, or coordination. These disturbances are caused by the known pharmacological effects of hallucinogens and their intensity is closely related to the amount of hallucinogen consumed. They are time-limited and abate as the hallucinogen is cleared from the body. Presenting features may include hallucinations, illusions, perceptual changes such as depersonalisation, derealization, or synesthesias (blending of senses, such as a visual stimulus evoking a smell), anxiety, depressed or dysphoric mood, ideas of reference, paranoid ideation, impaired judgment, palpitations, sweating, blurred vision, tremors and incoordination. Physical signs may include tachycardia, elevated blood pressure, and pupillary dilatation. In rare instances, hallucinogen intoxication may facilitate suicidal ideation and behaviour.

Index terms

  • Hallucinogen intoxication
  • LSD reaction
  • acute hallucinogen intoxication
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  • acute intoxication from hallucinogens
  • bad trip due to hallucinogens

Excludes

  • 6B63 – Possession trance disorder
  • NE60 – hallucinogens poisoning

Exclusions from above levels

  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Sibling codes

  • 6C49.0 – Episode of harmful use of hallucinogens
  • 6C49.1 – Harmful pattern of use of hallucinogens
  • 6C49.2 – Hallucinogen dependence
  • 6C49.4 – Hallucinogen-induced delirium
  • 6C49.5 – Hallucinogen-induced psychotic disorder
  • 6C49.6 – Certain specified hallucinogen-induced mental or behavioural disorders
  • 6C49.Y – Other specified disorders due to use of hallucinogens
  • 6C49.Z – Disorders due to use of hallucinogens, unspecified

Foundation entity

Hallucinogen intoxication – http://id.who.int/icd/entity/1750279358

Allowed postcoordination axes

Part of: 6C49: Disorders due to use of hallucinogens › 06: Mental, behavioural or neurodevelopmental disorders