For more information, see Organic Hallucinosis

Diagnostic Criteria

A. Recent ingestion of a hallucinogen.

B. Perceptual changes occurring in a state of full wakefulness and alertness, e.g., subjective intensification of perceptions, depersonalization, derealization, illusions, hallucinations, synesthesias.

C. At least two of the following physical symptoms:

  1. pupillary dilation
  2. tachycardia
  3. sweating
  4. palpitations
  5. blurring of vision
  6. tremors
  7. incoordination

D. Maladaptive behavioral effects, e.g., marked anxiety or depression, ideas of reference, fear of losing one's mind, paranoid ideation, impaired judgment, interference with social or occupational functioning.

E. Not due to any other physical or mental disorder.

Differential Diagnosis

Other substances

Various Substance-induced Intoxications, such as that due to cannabis, cause clinical pictures similar to the Hallucinogen Hallucinosis that results from low doses. In such cases, if an adequate history is not available, laboratory tests should be used to make the diagnosis.


See Substance-Induced Psychotic Disorder

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