Brief Psychotic Disorder presents with a symptom duration of between 1 and 30 days. Symptoms include delusions, hallucinations, and/or disorganized speech. Catatonia or disorganized behavior may or may not be present. Symptoms may or may not be in response to an identifiable stressor, and they should be noted as such, including postpartum onset. If symptoms are more consistent with a depressive or manic episode with associated psychotic features, another schizophrenia spectrum or psychotic disorder, ingestion of a substance (e.g. methamphetamine), or neurocognitive disorder (e.g. Due to Vascular Disease, associated with HIV Infection), then Brief Psychotic Disorder is excluded.