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Acute and Transient Psychotic Disorders (ATPD)

According to the ICD-10, the Acute and Transient Psychotic Disorders are a group of conditions characterized by the following features:

  • The occurrence of delusions, hallucinations, or incoherent or incomprehensible speech, that reach their full intensity within 2 weeks of starting.
  • These symptoms are not better accounted for by a Mood Disorder, Delirium, substance use, or a general medical condition.

Different subtypes of ATPD exist, some of which have a maximum duration of symptoms of 1 month, and others where the maximum duration is 3 months. For further information, see Chapter V, Block F23 on the ICD-10 website.


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Schizophreniform Disorder

Nonaffective Acute Remitting Psychosis (NARP)