And with all the buzz over medical marijuana, it's starting to gain an aura of healthfulness. The risks are increased when the drug is high in potency, used by children and young people and when taken frequently. One of the more troubling ones is the risk of having a psychotic episode.
Worryingly, the research found that a high proportion of new psychosis cases in Europe can be linked to the use of high-potency pot.
Many countries - including most recently Canada - have legalized or decriminalized cannabis use, leading to some concerns about increased use and its potential harm. But using high-potency cannabis, known as "skunk", which contains high levels of the compound THC, raised the risk five-fold. Also, THC and CBD content of the cannabis was not directly measured while the results might, at least in part, be down to those at greater risk of psychosis being more likely to use cannabis.
This means regular cannabis smoking accounts for 30.3 per cent of all new cases of psychosis in south London, according to the study, led by King's College London.
The study also found that the rate of cannabis use among the controls in a given location was linked with the rate of psychosis in that location.
They warned that 94 per cent of all cannabis available on the streets of the capital is now in the form of skunk.
Scientists say smoking high-potency marijuana every day could increase the chances of developing psychosis by about five times.
"The next priority is to identify which individuals are at risk from daily potent cannabis use", she wrote.
Use of high-potency weed nearly doubled the odds of having psychosis compared with someone who had never smoked weed, explains Di Forti.
Just over a fifth of the psychosis cases were thought to be linked to daily cannabis use across the 11 sites. "Now the scientific literature is catching up with the rapidly increasing THC potency we are seeing on the market today".Читайте также: Hundreds of hotel guests were secretly filmed and live-streamed online
And some products can be even more potent.
Almost 30 per cent of patients who had experienced a first episode of psychosis were daily cannabis users, compared with less than seven percent of those in the control group.
High-potency cannabis use was twice as likely to be used among those diagnosed with psychosis, with about 37 percent saying they used strong pot, compared with 19 percent of healthy controls.
It is cultivated to have super-high levels of the psychoactive ingredient THC, making it up to ten times more powerful than the "weed" and "hashish" common 20 to 30 years ago. Gage did not contribute to the study.
In those cities, strong pot is widely available.
"That's a really interesting finding, and that's not something anyone has done before", she adds.
The new study is "in line with a lot of research over the last few years showing an association between use of marijuana ... and onset of psychotic illness", said Dr. David Roane, chairman of psychiatry at Lenox Hill Hospital in New York City, who was not involved with the study.
The study reported on first-time psychotic episodes, and people can experience psychosis without ever being diagnosed with a long-term mental health condition, NIMH says.
"Cannabis carries severe health risks and users have a higher chance of developing psychosis".При любом использовании материалов сайта и дочерних проектов, гиперссылка на обязательна.
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