Psychiatric symptoms in cannabis users.
H Thomas
The British Journal of Psychiatry August 1, 1993 DOI: 10.1192/bjp.163.2.141 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Review Peer reviewed |
|---|---|
| Topics | Cannabis |
| Key findings | Cannabis does not cause chronic psychotic or affective disorders, though it may modify the course of established illness. |
Abstract
The usual phenomena of cannabis intoxication include experiences which in a non-intoxicated state would be considered as psychiatric symptoms. These can be distinguished from adverse reactions to cannabis, the commonest of which is an acute anxiety state. Acute psychotic episodes can also follow ingestion of the drug but are infrequent. These can be classified as acute confusional states and episodes occurring in clear consciousness. Neither presentation consistently shows enough specific features to warrant the diagnosis of 'cannabis psychosis' as a distinct clinical entity. The evidence that cannabis has a causative role in chronic psychotic or affective disorders is not convincing, although the drug may modify the course of an already established illness. Further controlled studies would be required to clarify the aetiological significance of the drug in these conditions.
Comparable studies
Other narrative reviews on cannabis, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Causal association between cannabis and psychosis: examination of the evidence | 2004 | Review | |
| Cannabis sativa: A comprehensive ethnopharmacological review of a medicinal plant with a long history. General (historical and pharmacological review) | 2018 | Review | |
| Psychiatric effects of cannabis | 2001 | Review | |
| Beyond THC: The New Generation of Cannabinoid Designer Drugs | 2011 | Review | |
| Cannabidiol, a Cannabis sativa constituent, as an antipsychotic drug | 2006 | Review |
Citations in the library
Cited by 22
- Psychiatric effects of cannabis The British Journal of Psychiatry February 1, 2001
- Cannabis-induced psychosis and subsequent schizophrenia-spectrum disorders: follow-up study of 535 incident cases The British Journal of Psychiatry November 30, 2005
- Cannabis use and age at onset of symptoms in subjects at clinical high risk for psychosis Acta Psychiatrica Scandinavica August 29, 2011
- Familial Predisposition for Psychiatric Disorder Archives of General Psychiatry November 3, 2008
- A review of Indian research on co-occurring cannabis use disorders & psychiatric disorders The Indian journal of medical research August 1, 2017
and 17 more in the library
Cites 12
- Psychotic Reactions Following Cannabis Use in East Indians Archives of General Psychiatry 1974
- A Clinical and Metabolic Study of Acute Intoxication with Cannabis Sativa and its Role in the Model Psychoses Journal of Mental Science October 1, 1958
- Psychiatric effects of cannabis use Acta Psychiatrica Scandinavica September 1, 1985
- ROLE OF CANNABIS IN PSYCHIATRIC DISTURBANCE Annals of the New York Academy of Sciences December 1, 1976
- Community-initiated research: a study of psychiatrists' conceptualisations of ‘cannabis psychosis’ Psychiatric Bulletin November 1, 1988
and 7 more in the library