In DSM-III, this category is called Other or Unspecified Substance-Induced Organic Mental Disorders

This section is to be used when an individual develops an Organic Brain Syndrome apparently due to use of a substance if:

  1. the substance cannot be classified in any of the ten previously listed categories (examples: Levo-dopa Delusional Disorder, Anticholinergic Delirium); or
  2. the syndrome is caused by an unknown substance (example: an Intoxication after taking a bottle of unlabeled pills).


These other (or unknown) substance-induced disorders are diagnosed instead of other (or unknown) substance intoxication or other (or unknown) substance withdrawal only when the symptoms are sufficiently severe to warrant independent clinical attention.

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