Seen this today and I think it is the first time I have ever heard anything about this... ? hmm.....

Marijuana may increase risk of psychosis
Drug makes some users more vulnerable to mental problems
Updated: 2:29 p.m. ET Dec. 1, 2004

Teenagers and young adults who frequently use cannabis are increasing their risk of suffering from psychotic symptoms such as bizarre behavior and delusions later in life, Dutch scientists said on Wednesday.

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Young people with a family history, or pre-existing susceptibility to mental instability, are particularly vulnerable to the negative effects of the drug.

“Cannabis does not act in the same fashion on psychosis risk for everybody. There is a group that is particularly susceptible,” Professor Jim van Os, of Maastricht University in the Netherlands, told a news conference.

He and his colleagues studied 2,437 young people aged 14-24 and identified those with a predisposition for psychosis. They also questioned them about their cannabis use and followed them up for four years.

“The results show that in the group without vulnerability to psychosis, there was a small effect of cannabis on the onset of psychotic symptoms four years later,” Van Os said.

“But this risk was four times bigger in individuals who had a personal vulnerability to psychosis.”

Van Os said the study also showed the odds of experiencing symptoms of psychosis were higher for people who smoked cannabis more frequently.

The findings, which are reported online by the British Medical Journal, are consistent with the results of other studies.

Doctors do not understand how cannabis increases the risk of mental illness but they suspect it affects the dopamine system in the brain which is associated with pleasure.

https://msnbc.msn.com/id/6629828/

[Green Lantern]

ive seen this one before, they use it for all drugs...the kid angle....what they are saying is if you are young, have mental problems and smoke pot, when you grow up you will have mental problems.......no shit scientists!!!!!

lol...so what you are saying that they are saying is, if you have mental problems you will always have mental problems even if you smoke marijuana...LOL
seems like that could be true!

[Dr. D]

U see this bullshit all around they do with all sorts not just drugs, there seems to be some reason why "they" try to suppress the use of all pcycho-active drugs, mmmn wonder why!!!!

[sunnyside]

well said GL... what does pot have to do with the study at all?
"But this risk was four times bigger in individuals who had a personal vulnerability to psychosis"

[Hooked-On-Grown]

I want to know what surroundings they were brought up in during this trial on these kids. There are many more factors then just the use of MJ.

[Green Lantern]

i have a friend that was born with only two fingers on his left hand......we smoked pot all the time when we were kids, sure enough, he is grown up now and has only two fingers on his left hand......damn that pot!!!

LOL :p

I wonder in this test, if they also tested a person that had problems but didnt have him smoke pot to see if his mental copasitey-spelled wrong- increased later.Or are they saying that it was just people that have mental disabilities that smoked pot in this study,and now will never get better because they smoke.GL,thats funny bcuz before i read youre post i was gonna say something like.I had a scar on my arm before i started smoking pot and now/i stil have a scar on my arm.StinkinPot! :p They always come up with some BS fact reports(and by they,i mean the man.lol).They make up facts all the time,but we are too intelligent of people and we have our own facts.So everytime a report like this comes out,we know better.

Don't know much bout their test. MJ does lower the seratonin levels in the brain. In theory someone who already has a chemical imbalance, wouldn't it make their condition worse. I'm of course am not educated in this just a thought of mine. So don't kill me for going against the grain.