Cannabis psychoses in south Sweden.
A Pålsson, S O Thulin, K Tunving
Acta Psychiatrica Scandinavica October 1, 1982 DOI: 10.1111/j.1600-0447.1982.tb00310.x (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Case series Case report Peer reviewed |
|---|---|
| Sample size | 11 |
| Population | Patients with psychosis in connection with cannabis abuse admitted to two mental hospitals |
| Topics | Cannabis |
| Key findings | Cannabis psychosis presents with a mixture of affective and schizophrenia-like symptoms, confusion, and aggressiveness, is self-limiting, and is a rare complication of cannabis abuse. |
Abstract
Eleven patients with a psychosis in connection with cannabis abuse admitted to two mental hospitals during 1 year were examined. Patients with a pre-existent psychosis or a mixed abuse were excluded. The patients were divided into three groups: acute, subacute and chronic. The features of the disease were essentially similar in all patients, with a mixture of affective and schizophrenia-like symptoms, confusion and a pronounced aggressiveness. The course as a rule was self-limiting leaving no residual symptoms. There was almost no heredity of severe mental disease. The symptoms were very similar to those seen in cycloid psychosis, and a possible relationship between the two diseases is discussed. As regards the widespread abuse of cannabis we conclude that psychosis is a rare complication but that in unclear psychotic states it is recommended to actively search for a cannabis psychosis.
Comparable studies
Other case reports and case series on cannabis, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Psychotic Reactions Following Cannabis Use in East Indians Patients at an Indian drug addiction clinic who developed acute cannabis-related psychosis | 1974 | Descriptive report (case series of clinical observations) | n = 200 |
| Psychiatric effects of cannabis use Swedish cases of cannabis psychosis | 1985 | Case series | n = 70 |
| Forty-Six Cases of Psychosis in Cannabis Abusers Gunila Bernhardson Habitual cannabis users treated for psychosis at Swedish psychiatric clinics and mental... | 1972 | Case series (retrospective survey of psychiatric records) | n = 46 |
| Hallucinogen persisting perception disorder after psilocybin consumption: a case study 18-year-old man with HPPD after mixed psilocybin and cannabis intoxication | 2005 | Case study | n = 1 |
| Cannabis‐induced Koro in Americans American men aged 22-26 with years of cannabis experience who reported negative... | 2001 | Case series | n = 3 |
Citations in the library
Cited by 14
- Cannabis-induced psychosis and subsequent schizophrenia-spectrum disorders: follow-up study of 535 incident cases The British Journal of Psychiatry November 30, 2005
- Psychiatric effects of cannabis use Acta Psychiatrica Scandinavica September 1, 1985
- Familial Predisposition for Psychiatric Disorder Archives of General Psychiatry November 3, 2008
- Is there a specific ‘cannabis psychosis’? Cambridge University Press eBooks May 27, 2004
- Cannabis Psychotic Disorder American Journal on Addictions 1994
and 9 more in the library