Brief Psychotic Disorder

A. Presence of one (or more) of the following symptoms: 

(1) delusions
(2) hallucinations
(3) disorganized speech (e.g., frequent derailment or incoherence) 
(4) grossly disorganized or catatonic behavior Note: Do not include a symptom if it is a culturally sanctioned response pattern. 

B. Duration of an episode of the disturbance is at least 1 day but less than 1 month, with eventual full return to premorbid level of functioning. 

C. The disturbance is not better accounted for by a Mood Disorder With Psychotic Features, Schizoaffective Disorder, or Schizophrenia and is not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication) or a general medical condition. 

Specify if: 

With Marked Stressor(s) (brief reactive psychosis): if symptoms occur shortly after and apparently in response to events that, singly or together, would be markedly stressful to almost anyone in similar circumstances in the person's culture 
Without Marked Stressor(s): if psychotic symptoms do not occur shortly after, or are not apparently in response to events that, singly or together, would be markedly stressful to almost anyone in similar circumstances in the person's culture 
With Postpartum Onset: if onset within 4 weeks postpartum

Reprinted with permission from the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision. Copyright 2000 American Psychiatric Association