[Actual approaches to post-psychotic depression]

Clinical features of post-psychotic depression in schizophrenia have been described since the beginning of the century. However, international nosographies mention this concept only since the ICD 10 and the DSM IV. In clinical practice, post-psychotic depression is a real challenge. Currently, the exact prevalence remains undetermined and is estimated about 25%, varying from 7 to 70% in the literature. The diagnostic criteria nowadays available will encourage searchers to determine the exact prevalence of post-psychotic depression. This is surely due to difficulties in the diagnostic approach. The clinical picture resembles that of major depression. However, there are confounding factors such as negative symptoms and extrapyramidal symptoms. With regard to psychometrics, two specific rating scales are thought to measure depressive symptoms in schizophrenia: the Calgary Depression Scale (CDS) and the Psychotic Depression Scale (PDS). Nonetheless, the scales are not specific for post-psychotic depression. Prognosis of an acute schizophrenia is linked among other factors with the emergence of a post-psychotic depression that is in turn influences suicidal risk and quality of life. Genetic, therapeutic, psychodynamic and psychological factors have been invoked in the etiopathogenesis of post-psychotic depression. In clinical practice, post-psychotic depression can be successfully treated with antidepressive medication. Some antidepressants have shown their efficacy.