psychosis

The Link Between Smoking and Cognitive Functioning in People with Psychosis

Citation
Vermeulen J, Schirmbeck F, Blankers M, van Tricht M, Bruggeman R, & van den Brink W. et al. (2018). Association Between Smoking Behavior and Cognitive Functioning in Patients With Psychosis, Siblings, and Healthy Control Subjects: Results From a Prospective 6-Year Follow-Up Study. American Journal Of Psychiatry, 175(11), 1121-1128.
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The tobacco epidemic is one of the biggest public health threats the world has ever faced, killing more than 7 million people a year (WHO).

People with psychosis are more likely to smoke compared to the general population and it is believed that this could have a negative impact on cognitive functioning.

Adversity, Cannabis Use and Psychotic Experiences

Citation
Morgan, C., Reininghaus, U., Reichenberg, A., Frissa, S., Hotopf, M., Hatch, S. L., & SELCoH Study Team. (2014). Adversity, cannabis use and psychotic experiences: evidence of cumulative and synergistic effects. The British Journal of Psychiatry, 204(5), 346-353.
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Abstract

Background

There is robust evidence that childhood adversity is associated with an increased risk of psychosis. There is, however, little research on intervening factors that might increase or decrease risk following childhood adversity.

Aims

Cannabis, a Significant Risk Factor for Violent Behavior in the Early Phase Psychosis

Citation
Moulin V, Baumann P, Gholamrezaee M, Alameda L, Palix J, Gasser J and Conus P (2018) Cannabis, a Significant Risk Factor for Violent Behavior in the Early Phase Psychosis. Two Patterns of Interaction of Factors Increase the Risk of Violent Behavior: Cannabis Use Disorder and Impulsivity; Cannabis Use Disorder, Lack of Insight and Treatment Adherence. Front. Psychiatry 9:294. doi: 10.3389/fpsyt.2018.00294
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Background: Previous literature suggests that prevalence of cannabis use in the early phase of psychosis is high, and that early psychosis patients are at high-risk for violent behavior. However, the link between cannabis use and violent behavior in early psychosis patients is unclear.

Differences between Psychotic Disorders with Concurrent Cannabis Use and Cannabis-Induced Psychoses

Citation
Amamou B, Fathallah S, Mhalla A, Saadaoui MH, Douki W, et al. (2017) Differences between Psychotic Disorders with Concurrent Cannabis Use and Cannabis-Induced Psychoses. J Addict Behav Ther 1:1
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Abstract

Background: The fact that Cannabis use can lead to psychotic symptoms has been recognized years ago. Moreover, when the patient is using cannabis, the distinction between a primary psychotic disorder and a cannabis-induced psychosis seems to be critical for the prognosis. However, few studies focused on the differences between these two diagnostic groups.

Association of Combined Patterns of Tobacco and Cannabis Use in Adolescence with Psychotic Experiences

Citation
Jones HJ, Gage SH, Heron J, Hickman M, Lewis G, Munafò MR, Zammit S. Association of Combined Patterns of Tobacco and Cannabis Use in Adolescence With Psychotic Experiences. JAMA Psychiatry. Published online January 17, 2018. doi:10.1001/jamapsychiatry.2017.4271
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Abstract

Importance: There is concern about potentially causal effects of tobacco use on psychosis, but epidemiological studies have been less robust in attempts to minimize effects of confounding than studies of cannabis use have been.

Proportion of Patients in South London with First-Episode Psychosis Attributable to Use of High Potency Cannabis

Citation
Di Forti, M., Marconi, A., Carra, E., Fraietta, S., Trotta, A., Bonomo, M., ... & Stilo, S. A. (2015). Proportion of patients in south London with first-episode psychosis attributable to use of high potency cannabis: a case-control study. The Lancet Psychiatry, 2(3), 233-238. DOI: https://doi.org/10.1016/S2215-0366(14)00117-5
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Summary

Background

The risk of individuals having adverse effects from drug use (eg. alcohol) generally depends on the frequency of use and potency of the drug used. We aimed to investigate how frequent use of skunk-like (high-potency) cannabis in south London affected the association between cannabis and psychotic disorders.

Cannabis and Psychosis: Neurobiology

Citation
Shrivastava A, Johnston M, Terpstra K, Bureau Y. Cannabis and psychosis: Neurobiology. Indian J Psychiatry [serial online] 2014 [cited 2018 Feb 12];56:8-16. Available from: http://www.indianjpsychiatry.org/text.asp?2014/56/1/8/124708
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ABSTRACT

Cannabis is a known risk factor for schizophrenia, although the exact neurobiological process through which the effects on psychosis occur is not well-understood. In this review, we attempt to develop and discuss a possible pathway for the development of psychosis.

Early Cannabis Use and Its Relation to the Development of Psychiatric Disorders

Citation
Roncero, C., Palma-Álvarez, R., Barrau, V., Urbano, N., Martínez-Luna, N., Ortiz-Medina, M., & Daigre, C. (2017). Early cannabis use and its relation to the development of psychiatric disorders: a review. Salud Mental, 40(6), 291-298. doi:https://doi.org/10.17711/SM.0185-3325.2017.037

Abstract:


Background: Cannabis is the most widely used illegal drug in the world. Both an early cannabis use onset and the amount used contribute to the risk of suffering mental disorders in adulthood. 
Objective: Review longitudinal studies conducted on adolescents associating early cannabis use with the subsequent occurrence of mental disorders.