ROLE OF CANNABIS IN PSYCHIATRIC DISTURBANCE
Annals of the New York Academy of Sciences December 1, 1976 DOI: 10.1111/j.1749-6632.1976.tb49886.x (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Case series / review of hospital admission records Case report Peer reviewed |
|---|---|
| Population | Male and other psychiatric patients admitted to two urban and four rural Jamaican hospitals |
| Duration | 12-month admission period for one psychiatric service |
| Topics | Cannabis |
| Citations | 33 |
| Key findings | The authors argue that hospital admission records support cannabis as a cause of, or modifier of, existing psychiatric illness, citing that one-third of male admissions to a psychiatric hospital had used cannabis and that 54 of 223 functional psychosis admissions (24.2%) had cannabis use as a contributing factor. They note that negative findings from controlled studies in the same country are not inconsistent with this view. |
Abstract
Clinical observation suggests that cannabis is implicated in some types of psychiatric disturbance. A record of admissions to two urban and four rural hospitals in Jamaica is examined along with details of individual cases. One-third of male admissions to the psychiatric hospital have used cannabis. Of 74 males admitted to another psychiatric service over a 12-month period, 29 had used cannabis. Ten of these patients were diagnosed as "ganja psychosis," and four others were classified as "marijuana-modified mania." At another psychiatric service, 54 of 223 admissions (24.2%) for functional psychosis presented with cannabis usage as a comtributory factor. These 54 patients included 14 and seven cases of hypomanic and depressive reactions, respectively. At three other rural general hospitals, psychiatric admissions for psychosis showed 11 of 51, seven of 18, and 39 of 75 patients, respectively, in whom cannabis was considered directly responsible. These findings lend support to the idea of causation of illness or modification of existing illness. The negative findings of controlled studies in the same country are not inconsistent. A suggested classification for adverse reactions to cannabis offered by one author is recommended, because it is in accord with common local clinical experience.
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 9
- Cannabis Psychotic Disorder American Journal on Addictions 1994
- Is “cannabis psychosis” a distinct category? European Psychiatry 1992
- Efectos del cannabis sobre la salud mental en jóvenes consumidores Revista de medicina de la Universidad de Navarra October 7, 2016
- Cannabis y psicopatología comorbida Adicciones April 15, 2002
- Cannabis and psychosis/schizophrenia: human studies European Archives of Psychiatry and Clinical Neuroscience July 16, 2009
and 4 more in the library