What is the duration of symptoms for a diagnosis of brief psychotic disorder?

For a diagnosis of brief psychotic disorder, the symptoms must last for more than one day but less than one month. This time frame differentiates brief psychotic disorder from other psychotic disorders, such as schizophrenia, which requires symptoms to persist for at least six months, and schizophreniform disorder, where symptoms last between one month and six months. The hallmark of brief psychotic disorder is the rapid onset of symptoms, which can include delusions, hallucinations, disorganized speech, or grossly disorganized or catatonic behavior, and their resolution within a month. This distinction is essential for both diagnosis and treatment planning, as brief psychotic disorder often has a favorable prognosis with the possibility of full recovery following the acute episode.