Hallucinogen Use Disorders

  1. Hallucinogen Dependence
  2. Hallucinogen Abuse

Hallucinogen-Induced Disorders

  1. Hallucinogen Intoxication
  2. Hallucinogen Persisting Perception Disorder (Flashbacks)
  3. Other Hallucinogen-Induced Disorders

Hallucinogen-Related Disorder NOS

Differential Diagnosis

Primary Mental Disorders

Hallucinogen-Induced Disorders may be characterized by symptoms (e.g., delusions) that resemble primary mental disorders (e.g., Schizophreniform Disorder versus Hallucinogen-Induced Psychotic Disorder, With Delusions, With Onset During Intoxication).

Other Substance-Related Disorders

Hallucinogen Intoxication should be differentiated from Amphetamine or Phencyclidine Intoxication. Toxicological tests are useful in making this distinction. Intoxication with anticholinergics can also produce hallucinations, but they are often associated with physical findings of fever, dry mouth and skin, flushed face, and visual disturbances. Hallucinogen Intoxication is distinguished from the other Hallucinogen-Induced Disorder (e.g., Hallucinogen-Induced Anxiety Disorder, With Onset During Intoxication) because the symptoms in these latter disorders are in excess of those usually associated with Hallucinogen Intoxication and are severe enough to warrant independent clinical attention.

Hallucinogen Persisting Perception Disorder

Hallucinogen Intoxication is distinguished from Hallucinogen Persisting Perception Disorder (Flashbacks) by the fact that the latter continues episodically for weeks (or longer) after the most recent intoxication. In Hallucinogen Persisting Perception Disorder, the individuals does not believe that the perception represents external reality, whereas a person with a Psychotic Disorder often believes that the perception is real. Hallucinogen Persisting Perception Disorder may be distinguished from migraine, epilepsy, or a neurological condition by neuro-ophthalmological history, physical examination, and appropriate laboratory evaluation.



  1. Phencyclidine Use Disorder
  2. Other Hallucinogen Use Disorder
  3. Phencyclidine Intoxication
  4. Other Hallucinogen Intoxication
  5. Hallucinogen Persisting Perception Disorder
  6. Other Phencyclidine-Induced Disorders
  7. Other Hallucinogen-Induced Disorders
  8. Unspecified Phencyclidine-Related Disorder
  9. Unspecified Hallucinogen-Related Disorder
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