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In the rush to legalize marijuana in Canada, medical experts are warning about weed’s alarming side, particularly for younger users .
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These data and subsequent analysis suggest that different trajectories of adolescent cannabis use are associated with distinct patterns of neural reward circuit function in early adulthood. Escalating marijuana use presents a higher risk for impaired motivation, including elevated depressive symptoms, anhedonia and poor educational attainment. It follows that alterations, perhaps the degradations of the reward circuitry, represent the mechanism by which cannabis users fail to attain their potential, resulting in both developmental and dose-dependent impairment in their higher-level functioning.
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"The False Dichotomy of Legalization and Criminalization"
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Study: You could fail a drug test from second hand marijuana smoke
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Schizophrenia Bulletin, sbx158
Published: 28 November 2017
Background
Cannabis use in young people is common and associated with psychiatric disorders. However, the prospective link between cannabis use and bipolar disorder symptoms has rarely been investigated. The study hypothesis was that adolescent cannabis use is associated with hypomania in early adulthood via several potential etiological pathways.
Results & Conclusions
Data were available on 3370 participants. Cannabis use at least 2–3 times weekly was associated with later hypomania (OR = 2.21, 95% CI = 1.49–3.28) after adjustment - Adolescent cannabis use may be an independent risk factor for future hypomania, and the nature of the association suggests a potential causal link. Cannabis use mediates the link between childhood abuse and future hypomania. As such it might be a useful target for indicated prevention of hypomania.