I came across this article and thought it would be an interesting read.....
Marijuana (cannabis) use may be linked to the development of
psychotic symptoms in teens - but the reverse could also be true: psychosis in
adolescents may be linked to later pot use, according to a new Dutch study.
"What is interesting in this study is that both processes
are going on at the same time," said Dr. Gregory Seeger, medical director
for addiction services at Rochester General Hospital in upstate New York.
He told Reuters Health that researchers have been especially
concerned about what tetrahydrocannabinol (THC), the active property in pot,
could do to a teenager's growing brain.
"That's a very vulnerable period of time for brain
development," and individuals with a family history of schizophrenia and
psychosis seem to be more sensitive to the toxic effects of THC, he said.
A 2010 study of 3,800 Australian teenagers found that those
who used marijuana were twice as likely to develop psychosis compared to teens
who never smoked pot (see Reuters Health article of March 1, 2010 here:).
But that study also found that those who suffered from
hallucinations and delusions when they were younger were also more likely to
use pot early on.
For the new study, published in the journal Addiction, the
researchers wanted to see which came first: pot or psychosis.
For example, using pot at 16 years old was linked to
psychotic symptoms three years later, and psychotic symptoms at age 16 were
linked to pot use at age 19.
This was true even when the researchers accounted for mental
illness in the kids' families, alcohol use and tobacco use.
The study's lead author Merel Griffith-Lendering, a doctoral
candidate at Leiden University in The Netherlandsm said she could not say how
much more likely young pot users were to exhibit psychotic symptoms later on.
Also, the new study cannot prove one causes the other. Genetics may also explain the link between
pot use and psychosis, said Griffith-Lendering.
Dr. Gregory Seeger, medical director for addiction services
at Rochester General Hospital in upstate New York, said that there needs to be
more public awareness of the connection.
"I think the marijuana is not a harmless substance.
Especially for teenagers, there should be more of a public health message out
there that marijuana has a public health risk," he said.
Griffith-Lendering agrees. "Given the severity and impact of psychotic disorders,
prevention programs should take this information into consideration," she
said.