Zur Psychopathologie und Differentialdiagnose sogenannter Cannabispsychosen

Abstract

From 237 patients examined for drug-induced psychoses, 50 cannabis psychoses were examined according to the criterion "main cause of addiction" and 107 were examined according to the criterion "consumption during the last three months before hospitalization". The cannabis psychoses were compared to the other drug-induced psychoses as well as to a control group consisting of 219 schizophrenic patients. General agreement was found with the other drug-induced psychoses as well as with the group of schizophrenic patients. The variation from the symptomatology of the schizophrenics is generally common to both the cannabis psychoses and the other drug-induced psychoses. Judging by the results of our investigations, it must be concluded that there is no disease "cannabis psychosis" in its own right, just as the disease "drug-induced psychosis" also does not exist in its own right. While there is a certain slight drug-specific psychopathological undertone, it does not entitle us to speak of a syndromatic or indeed a nosological entity. The psychopathological cross section does not permit a differentiation in the individual psychoses groups mentioned, although this has often been attempted in the literature. That there are no relevant psychopathological differences between cannabis psychoses and endogenous schizophrenia could, for one, be based on the fact that we are observing the final stage of one and the same underlying pathological process. In this case both syndromes would in practice be endogenous psychoses, with the cause not being known in one case. The psychopathologic similarity of these two psychoses forms could, however, also be based on the assumption that cannabis psychoses are triggered schizophrenias, so that we could in both cases be dealing with one and the same disease. We see the solution to the problem of diagnosing symptomatic psychoses, and in particular cannabis psychoses, in making a diagnosis that takes the etiology into consideration in addition to the syndrome diagnosis.

Cannabis‐induced psychosis: a cross‐sectional comparison with acute schizophrenia

“…According to many authors, prolonged, heavy use of cannabis induces a clinical picture to a large extent similar to schizophrenia (21, 33, 40–43) or schizoaffective disorder (22). Similar observations have led authors of different periods to state that cannabis‐induced psychoses are only the first step toward schizophrenia (30, 44). Two reviews (45, 46) concluded that there is an insufficient empirical basis for accepting CP as a diagnostic entity.…”

Psychotische Störungen und Drogenmissbrauch bei Jugendlichen

“…Nach der Definition des ICD-10 ist dies nicht möglich, obwohl Fälle dieser Art in der internationalen Literatur vielfach beschrieben wurden (BRON, 1980, FLAUM, 1996, IWANAMI et al, 1994, McGUIRE, 1995 (BRON, 1980, HAMBRECHT et al, 1996, REMSCHMIDT, 1973 (ANDREASON et al, 1989, FLAUM, 1996, IWANAMI et al, 1994, MARTINEZ-AREVALO et al, 1994, MATHERS & GHODSE, 1992, McGUIRE, 1994, McGUIRE et al, 1995, TÄSCHNER, 1983 (BRON et al, 1980, JULIEN, 1997, HAMBRECHT et al, 1996, McGUIRE et al, 1994 McGUIRE et al, 1994, PERALTA, 1992, MILIN, 1996, DIXON et al, 1991 …”

“…Bei Untersuchungsbeginn gingen wir davon aus, dass die prämorbide Formen der Psychose in ihrer klinischen Erscheinung ähnlich sind (IWANAMI et al, 1994, McGUIRE, 1993, TÄSCHNER, 1983 …”

Halluzinogen-induzierte psychische Störungen

“…Die komplexe psychopathologische Phänomenologie des Rausches unter halluzinogenen Drogen ist in den letzten jahrzehnten in der Literatur ausführlich analysiert und beschrieben worden (Beringer, 1927;Leuner, 1962;Bron, 1982;Täschner, 1980Täschner, , 1983 (Hermle et aI., 1992(Hermle et aI., a, b, 1993.…”