Cannabis

The legalization of recreational cannabis in Colorado and Washington state was not associated with increases in adolescent treatment admissions for the drug, according to new research published in Drug and Alcohol Dependence. "The growth of marijuana legalization represents a dramatic...

A literature review of 47 studies found that nearly half of cannabis users met criteria for cannabis withdrawal syndrome. The review was published in The Journal of the American Medical Association. Although cannabis is typically seen as a relatively safe...

New research published in Drug and Alcohol Dependence has found a complicated and counterintuitive relationship between cannabis use among adolescents and depression. The study found that adolescents who had used cannabis at any point were more likely to show symptoms...

A study published in Addictive Behaviors found that regular users of cannabis showed diminished affective responses to stress as measured by their positive affect, stress, and anxiety following several stress tasks. Their cardiovascular responses to stress, however, were comparable to...

Women tend to experienced the same acute effects of cannabis as men at a lower dose of THC, according to new research published in Psychopharmacology which sought to mimic real-world smoking practices. "We know from population survey data that men are...

New research sheds light on the pharmacodynamic effects of cannabis-infused food. The findings, which appear in Drug and Alcohol Dependence, indicate that relatively small differences in doses can result in large differences in effects among infrequent cannabis users. "There have...

New research has found that cannabis tolerance is linked to neurometabolic alterations in the brain's reward circuitry. The findings, published in the journal Addiction Biology, help explain why the effects of cannabis are less prominent in frequent cannabis users. "Cannabis...

Adolescents who use or have used cannabis are much less likely to engage in adequate levels of physical activity, according to a study published in Drug and Alcohol Dependence. The vast majority of adolescents around the world do not meet...

Cannabis appears to help induce sleep but it does not seem to promote sleep continuity, according to new preliminary research published in the journal Drug and Alcohol Dependence. "Cannabis use (medical and recreational use) probably has an impact on sleep...

Age of onset of regular cannabis use is predictive of lower adult sleep duration, according to a new study published in the journal Drug and Alcohol Dependence. The findings suggest that trouble sleeping is one of the developmental consequences for...

The psychedelic experience is associated with persisting reductions in cannabis, opioid, and stimulant use, according to new research published in Frontiers in Psychiatry. The findings provide more evidence that psychedelics may hold potential in the treatment of substance use disorders....

A new study published in Addictive Behaviors indicates that different motives for cannabis use are associated with different mental health outcomes. The research suggests that people with high levels of stress should avoid using cannabis to cope as doing so...

There "is a notable absence of high-quality evidence" that cannabis has a therapeutic effect in many mental disorders, according to a comprehensive review and meta-analysis of existing research published in The Lancet. "Medicinal cannabinoids, including medicinal cannabis and pharmaceutical cannabinoids...

Adults tend to use cannabis more frequently if they had elevated depressive symptoms in adolescence, but this does not appear to be the case among adults with a history of attention-deficit/hyperactivity disorder (ADHD), according to new research. The findings have...

Post-traumatic stress disorder (PTSD), a psychiatric condition linked to surviving or witnessing a traumatic life event, will affect around one in 10 Canadians at some point in their lives. PTSD can cause agitation, flashbacks, impaired concentration and memory, insomnia and...