|An acute psychotic disorder in which the psychotic symptoms are comparatively stable and fulfill the criteria for schizophrenia but have lasted for less than 1 month. Some degree of emotional variability or instability may be present, but not to the extent described in acute polymorphic psychotic disorder.|
For a definite diagnosis:
(a) the onset of
psychotic symptoms must be acute (2 weeks or less from a
nonpsychotic to a clearly psychotic state);
If the schizophrenic symptoms last for more than 1 month, the diagnosis should be changed to schizophrenia.