by National Drug and Alcohol Research Centre
In the first Australian study of its kind, 559 cannabis-related deaths identified between 2000 and 2018 have been examined by researchers at the National Drug and Alcohol Research Centre (NDARC), UNSW Sydney.
The leading cause of death was accidental injury (30 percent), followed by suicide (25 percent), and polysubstance toxicity (17 percent).
Lead author, Ms Emma Zahra said motor vehicle accidents were the leading cause of accidental injury deaths (75 percent).
"One in five motor vehicle accident deaths were pedestrians, highlighting that acute cannabis and polysubstance intoxication can affect information processing and perception of risk."
None of the deaths identified were due to cannabis toxicity alone.
The mean age of death was 35.8 years and more than 80 percent of cases were male. 62 percent were aged under 40 years with the highest proportion of cases in the 30-39 age bracket.
"Men were over-represented and were three times more likely to die due to accidental injury than women," said Ms Zahra
Cannabis is a gateway drug that gives users a heightened sensitivity to harder illegal substances like cocaine, a new study suggests.
US researchers found adolescent rats that had been pre-exposed to cannabis had an enhanced reaction to their first exposure to cocaine.
Exposure to psychoactive cannabinoids during adolescence was found to 'prime' the animal's prefrontal cortex in the brain.
If applied to humans, the study suggests smoking a lot of weed as a teenager makes people more sensitive to cocaine and can lead to continued use and addiction.
Cannabis abuse during adolescence can enhance a person's initial positive experience with a different drug, such as cocaine, leading to sustained use.
Cannabinoid exposure in rat adolescence reprograms the initial behavioral, molecular, and epigenetic response to cocaine
The Science – Significance - The endocannabinoid system has a modulatory role in brain reward and cognitive processes. It has been hypothesized that repeated interference with endocannabinoid signaling (e.g., through abuse of cannabis or synthetic cannabinoids) can remodel the adolescent brain and make it respond differently to more addictive substances, such as cocaine. In the present study, we demonstrate that a history of synthetic cannabinoid exposure in adolescent animals results in distinct molecular and epigenetic changes following initial exposure to cocaine. These changes were pronounced in the prefrontal cortex and associated with an enhanced response to cocaine’s stimulatory effects. The prefrontal cortex is a brain region that still undergoes maturation in adolescence and its dysfunction contributes to the development of addictions.
Cannabis is the third most used psychoactive substance worldwide. The legal status of cannabis is changing in many Western countries, while we have very limited knowledge of the public health impact of cannabis-related harms. There is a need for a summary of the evidence of harms and risks attributed to cannabis use, in order to inform the definition of cannabis risky use. We have conducted a systematic review of systematic reviews, aiming to define cannabis- related harms. We included systematic reviews published until July 2018 from six different databases and following the PRISMA guidelines. To assess study quality we applied the AMSTAR 2 tool. A total of 44 systematic reviews, including 1,053 different studies, were eligible for inclusion.
Harm was categorized in three dimensions: mental health, somatic harm and physical injury (including mortality).
Evidence shows a clear association between cannabis use and psychosis, affective disorders, anxiety, sleep disorders, cognitive failures, respiratory adverse events, cancer, cardiovascular outcomes, and gastrointestinal disorders.
Moreover, cannabis use is a risk factor for motor vehicle collision, suicidal behavior and partner and child violence. Cannabis use is a risk factor for several medical conditions and negative social consequences. There is still little data on the dose-dependency of these effects; evidence that is essential in order to define, from a public health perspective, what can be considered risky use of cannabis.
This definition should be based on quantitative and qualitative criteria that informs and permits the evaluation of current approaches to a regulated cannabis market.
She couldn’t see how it was effecting her – Users nearly always don’t
The Lancet Psychiatry: Single dose of psychoactive component in cannabis could induce psychotic, depressive, and anxiety symptoms in healthy people
A single dose of the main psychoactive component in cannabis, tetrahydrocannabinol (THC), can induce a range of psychiatric symptoms, according to results of a systematic review and meta-analysis of 15 studies including 331 people with no history of psychotic or other major psychiatric disorders, published in The Lancet Psychiatry journal. #weed #preventdontpromote