A sharp striking delusion with quick changes in the structure occurs in the individual who suffers from acute psychosis after a short preliminary period of anxiety, insomnia, and confusion.

Acute psychosis lasts for a short time, typically from one to two weeks.

He had come up with two classifications: manic-depressive psychosis and dementia praecox.

However, a number of psychiatrists expressed their disagreement with Kraepelins dichotomous classification for they found a third classification of the condition which was named acute or subacute polymorphic psychosis.

This third psychosis was associated with stress, had changing symptomatology, and was a condition that patients can recover from completely.

Some psychiatrists have also pointed out that acute schizophrenia episode should not be encompassed under schizophrenia and commented that it was quite different from schizophrenia and manic-depressive psychosis.

About 40 of patients with acute onset psychosis reportedly do not fit into the diagnosis of schizophrenia or depression.

DSM IV classified acute psychosis more specifically than ICD-10.

Thus, every Brief Psychosis could be diagnosed as Acute and Transient Psychotic Disorder but not the other way around.

The time interval between the first appearance of any psychotic symptoms and the presentation of the fully developed disorder should not exceed 2 weeks.

With Postpartum Onset: if onset is within 4 weeks postpartum.

Females and people from rural areas are more likely to manifest acute psychosis.

The age of onset of acute psychosis is similar to schizophrenia in men, but younger in females when compared to the onset of schizophrenia.

Individuals with acute psychosis are found to experience significantly less amount of stress prior to the onset of their acute psychotic illness when they have a positive family history of psychiatric disorder in their first degree relatives.

It is important that the patient is given antipsychotic medications in addition to appropriate training and therapy to improve their psychosocial skills.

Amphetamine Psychosis Definition