Friday, July 27, 2007

Pot smoking linked to psychotic disorders




Pot smoking linked to psychotic disorders
Heavy marijuana use doubles the risk, new research finds.
By Jia-Rui Chong, Times Staff Writer
July 27, 2007
People who smoke marijuana daily or weekly double their risk of developing a psychotic illness over their lifetime, according to a study published Thursday.
Among all cannabis users, including sporadic experimenters and habitual users, the lifetime risk of psychotic illness increased by 40%, the report said.
"It's not as if you smoke a joint and you're going to go crazy," said Richard Rawson, who directs the Integrated Substance Abuse Program at UCLA and was not involved in the study.
But he cautioned: "It's definitely not a good idea to use heavy amounts of marijuana."
The researchers found that the risk for psychotic illnesses did appear to increase with dose, suggesting that stopping marijuana use would decrease risk, said coauthor Dr. Stanley Zammit, a psychiatrist at Cardiff University and the University of Bristol in Britain.
Psychotic illnesses include schizophrenia and disorders with such symptoms as hallucinations or delusions.
Marijuana is the most commonly used illicit drug in the U.S., according to the federal government. In 2006, about 42% of America's high school seniors reported having tried marijuana at least once, according to an annual report funded by the National Institute on Drug Abuse.
Marijuana can cause psychiatric problems because it throws off the balance of neurotransmitters in the brain, Zammit said.
Previous studies have had difficulty untangling marijuana's role in psychiatric disorders. Smoking the drug could be a symptom of a disorder rather than a cause.
The study by Zammit and colleagues, published in the medical journal the Lancet, reanalyzed data from seven long-term studies on psychotic illnesses and marijuana involving 61,000 participants.
The researchers filtered out about 60 factors, such as preexisting mental illness and the use of other illicit drugs, and considered IQ and social class, to try to isolate the effect of marijuana, Zammit said.
Most of the studies that were analyzed indicated a range of increased risk for frequent users from 50% to 200%, with the average being about 100%, or double the risk, Zammit said.
The researchers also studied the relationship between marijuana use and mood disorders, such as depression and bipolar disorder. They analyzed 22 studies involving 52,000 participants.
The researchers found that any marijuana use increased the lifetime risk for mood disorders by about 40%, and weekly or daily use increased the risk by about 50%.
The mood disorder studies were less successful in filtering outside factors, so the increased risk may be unrelated to smoking marijuana, Zammit said.
Dr. Victor Reus, a psychiatrist at UC San Francisco who was not involved in this study, said he was unconvinced by Zammit's conclusions for both psychotic and mood disorders.
Too many outside factors contribute to the disorders, and the studies Zammit used were too vague to draw hard conclusions, he said.
"There's a limit to what you can do with the data that's in these studies," he said.
--
jia-rui.chong@latimes.com

34 comments:

Anonymous said...

курские студенты видео http://free-3x.com/ 18 ти летние порно free-3x.com/ молоденькая онлайн порно [url=http://free-3x.com/]free-3x.com[/url]

Anonymous said...

[url=http://community.bsu.edu/members/buy+online+Viagra.aspx]Viagra no script fedex[/url]

[url=http://eterporno.ru/prostitutki-g-hmelnickiy.php]проститутки г хмельницкий[/url]
[url=http://eterporno.ru/pamyatnik-prostitutke-praga.php]памятник проститутке прага[/url]

[url=http://pc.eterporno.ru/prostitutki-saratova-engelsa.php]проститутки саратова энгельса[/url]
[url=http://pc.eterporno.ru/prostitutki-g-voronezha.php]проститутки г воронежа[/url]

[url=http://pv.eterporno.ru/trans-intim-dosug.php]транс интим досуг[/url]
[url=http://pv.eterporno.ru/znakomstva-g-usinsk.php]знакомства г усинск[/url]
[url=http://px.eterporno.ru/index.php]интим услуги барнаул[/url]
[url=http://px.eterporno.ru/mamba-sayt-znakomstv-samyy-populyarnyy.php]мамба сайт знакомств самый популярный[/url]
[url=http://px.eterporno.ru/telefon-seks-znakomstva.php]телефон секс знакомства[/url]

[url=http://pz.eterporno.ru/dosug-nu.php]досуг ну[/url]
[url=http://pz.eterporno.ru/seks-bolshogo-goroda.php]секс большого города[/url]

Anonymous said...

whoisjohngalt femaledating [url=http://loveepicentre.com/]free bdsm dating service[/url] dating tips http://loveepicentre.com/ meaning of exclusive dating

Anonymous said...

Well... that's quiet interessting but actually i have a hard time seeing it... wonder how others think about this..

Anonymous said...

help for high blood pressure [url=http://usadrugstoretoday.com/products/plavix.htm]plavix[/url] colin health http://usadrugstoretoday.com/products/serevent.htm diabetes athlete foot htm http://usadrugstoretoday.com/products/femcare.htm
songs about vitamin a [url=http://usadrugstoretoday.com/catalogue/e.htm]No prescription online pharmacy[/url] arkansas breast surgeon [url=http://usadrugstoretoday.com/products/fludac.htm]health canada warnings[/url]

Anonymous said...

ebol bacteria [url=http://usadrugstoretoday.com/products/revia.htm]revia[/url] thick penis pictures http://usadrugstoretoday.com/products/clonidine.htm barrx medical http://usadrugstoretoday.com/products/flonase.htm
diabetic pump supplies [url=http://usadrugstoretoday.com/products/abana.htm]abana[/url] amy reid milky orgasm video [url=http://usadrugstoretoday.com/products/imodium.htm]physicians reference lab overland park ks drug screen[/url]

Anonymous said...

llama syndrome [url=http://usadrugstoretoday.com/products/provera.htm]provera[/url] sport and health fitness centers http://usadrugstoretoday.com/products/brand-cialis.htm supplements for common prescription drugs http://usadrugstoretoday.com/catalogue/i.htm
bi polar disorder dillusions [url=http://usadrugstoretoday.com/categories/parte-pills.htm]parte pills[/url] medical mission to tibet [url=http://usadrugstoretoday.com/products/augmentin.htm]diseases and infections of chicken factory farming[/url]

Anonymous said...

http://meen.in/celebrex/abuse-celebrex
[url=http://meen.in/cardura/cardura-argentina-venta]organic pharmacy nc[/url] drug tests cost [url=http://meen.in/evista/rom-evista-autos]rom evista autos[/url]
hoodia drug interactions http://meen.in/erythromycin/does-erythromycin-treat-syphilis
[url=http://meen.in/cefdinir/infections-treated-by-cefdinir]serious illness hospital teens drug problem after[/url] ingredients in norvasc drug [url=http://meen.in/fluoxetine/fluoxetine-overdose-cused-parkinsonism]fluoxetine overdose cused parkinsonism[/url]
group home drug testing policy sample http://meen.in/flomax/flomax-alternatives
[url=http://meen.in/fluoxetine/fluoxetine-toxticity]current drug articles[/url] pharmacy related jobs in kpo mumbai [url=http://meen.in/etidronate/etidronate]etidronate[/url] alcohol dependant and drug dependant university students [url=http://meen.in/flonase/flonase-withdrawal]flonase withdrawal[/url]

Anonymous said...

volkswagen autosleeper motorcaravans http://eautoportal.in/auto-info/miracle-auto-financing restored volkswagen van for sale
[url=http://eautoportal.in/automobiles/can-methane-gas-be-used-as-a-source-of-fuel-for-automobiles]puerto rico automobile title[/url] hedrick automobile columbus oh [url=http://eautoportal.in/geo/geo-heat-pumps]geo heat pumps[/url]
volkswagen dealers nh http://eautoportal.in/hummer
[url=http://eautoportal.in/jaguar/replacement-antenna-jaguar-xk]automobile repair standards brakes brake line[/url] automobile lifts comparison [url=http://eautoportal.in/hummer/moore-cadillac-hummer]moore cadillac hummer[/url]
granatelli of auto racing http://eautoportal.in/ford-car/judith-moore-ford
[url=http://eautoportal.in/bentley/classic-bentley-saloon]mercedes benz dealership northwest indiana[/url] mercedes benz 2000 ml320 cd navigation [url=http://eautoportal.in/citroen]citroen[/url]

Anonymous said...

travel table http://atravel.in/lufthansa_boeing-c-97a-stratofreighter-package lacey washington travel info
[url=http://atravel.in/plane-tickets_purchase-air-plane-tickets-in-mexico]los altos bakery long beach ca travel trip hotel visiting[/url] cheap caribbean travel the world cruise [url=http://atravel.in/hotel_los-vegas-rio-hotel]los vegas rio hotel[/url]
travel comments myspace http://atravel.in/tour_aerosmith-tour-schedule
[url=http://atravel.in/airport_premier-parking-manchester-airport]canada travel mileage[/url] cheap travel search engines [url=http://atravel.in/car-rental_alamo-rental-car-luton-airport]alamo rental car luton airport[/url]
how has space travel affected peoples lives http://atravel.in/cruise_manohra2-dinner-cruise-bangkok wii g pak travel case [url=http://atravel.in/travel_west-des-moines-travel]west des moines travel[/url]

Anonymous said...

travel cube game http://greatadventures.in/travel/buy-your-own-travel-business us travel agency
[url=http://greatadventures.in/car-rental/alamo-car-rental-lincoln]alternative forms of identification for air travel[/url] travel agent in indonesia [url=http://greatadventures.in/inn]inn[/url]
manila philippines travel http://greatadventures.in/tour/virtual-museum-tour-of-miami-museum-of-science
[url=http://greatadventures.in/airport/servisair-at-sky-harbor-airport]cheap england travel world cruises[/url] travel management solutions [url=http://greatadventures.in/tours/jellybelly-factory-tours]jellybelly factory tours[/url]
travel electronics valet surge protector http://greatadventures.in/expedia/internet-explorer-error-with-expedia cheap travel insurance miami [url=http://greatadventures.in/cruise/cruise-theme-party-supplies]cruise theme party supplies[/url]

Anonymous said...

fashion soiree http://topcitystyle.com/navy-blue-white-leather-shoes-color124.html famous fashion designers [url=http://topcitystyle.com/men-page19.html]ice slip on shoes springs[/url] taking clothes off
http://topcitystyle.com/gaastra-antarctica-polo-shirt-for-women-black-item1838.html china urban clothes and shoes online [url=http://topcitystyle.com/?action=products&product_id=2134]ally fashions[/url]

Anonymous said...

born shoes and boots http://topcitystyle.com/purple-brown-jackets-amp-sweatshirts-color27.html affordable designer drawer pulls [url=http://topcitystyle.com/roberto-cavalli-shirts-brand7.html]toddler girls clothes[/url] arabic fashion
http://topcitystyle.com/green-t-shirts-for-men-color53.html chilean baby clothes [url=http://topcitystyle.com/-casual-armani-category34.html]fashion design classes dallas[/url]

Anonymous said...

games for windows mobile 6 http://www.orderphonetoday.com/zt2688-quad-band-dual-card-with-analoy-tv--item63.html unlock code for lg mobile phone [url=http://www.orderphonetoday.com/changjiang-w001-quad-band-dual-card-with-wifi--item32.html]purchase virgin mobile phone online[/url] press register mobile al

Anonymous said...

union bay shoes http://luxefashion.us/jean-paul-gaultier-t-shirt-for-men-orange-item2026.html song lyrics to fashionista [url=http://luxefashion.us/l-armani-size7.html]bongo shoes[/url] gucci minaudiere
http://luxefashion.us/men-page106.html designer patio furniture [url=http://luxefashion.us/grey-sport-zip-jacket-and-pants-color1.html]ralph laurenpickstitch stovepipe[/url]

Anonymous said...

heart montitor [url=http://usadrugstoretoday.com/products/maxaman.htm]maxaman[/url] prescription assistance programs http://usadrugstoretoday.com/products/aciclovir.htm
recent classification of hypertension [url=http://usadrugstoretoday.com/products/xtz--energy-booster-.htm]xtz energy booster[/url] affordable health insurance north carolina [url=http://usadrugstoretoday.com/products/premarin.htm ]big japanese breast [/url] heart and stroke pool tournament
separation anxiety disorder tantrum [url=http://usadrugstoretoday.com/products/altace.htm]altace[/url] door hardware for mental health http://usadrugstoretoday.com/products/protonix.htm
nuclear medicine board review [url=http://usadrugstoretoday.com/categories/gums.htm]gums[/url] literatures related to community health status [url=http://usadrugstoretoday.com/products/buspar.htm ]supplier viagra [/url] travel cart for medical books

Anonymous said...

vans discontinued shoes http://luxefashion.us/?action=products&product_id=1825 god chanel [url=http://luxefashion.us/?action=products&product_id=947]fashion marketing[/url] etonics shoes
http://luxefashion.us/blue-white-armani-color87.html truth by calvin klein [url=http://luxefashion.us/yellow-brown-evening-cocktail-color194.html]merrill shoes[/url]

Anonymous said...

reflux surgery diet recipes [url=http://usadrugstoretoday.com/categories/erectile-dysfunction.htm]erectile dysfunction[/url] sleeping giant hike connecticut http://usadrugstoretoday.com/products/french-red-wine.htm
penis infection [url=http://usadrugstoretoday.com/products/naprosyn.htm]naprosyn[/url] big breast beautiful girls [url=http://usadrugstoretoday.com/products/ceftin.htm ]addiction drug treatment htm [/url] kohls mineral wells
temple university medical [url=http://usadrugstoretoday.com/products/bactroban.htm]bactroban[/url] degenerative disease similar to rett syndrome http://usadrugstoretoday.com/categories/gum.htm
oriental tea set [url=http://usadrugstoretoday.com/products/sublingual-viagra.htm]sublingual viagra[/url] fake muscle costumes [url=http://usadrugstoretoday.com/products/noroxin.htm ]corprate views on medical cannibus [/url] asperber syndrome

Anonymous said...

discount baby clothes http://luxefashion.us/off-white-casual-color195.html teen fashion magazine [url=http://luxefashion.us/?action=products&product_id=1638]madeline shoes[/url] fashion dress up games
http://luxefashion.us/black-golden-pants-color92.html modern infant shoes [url=http://luxefashion.us/black-orange-color208.html]the gap clothes store[/url]

Anonymous said...

super bowl online betting http://xwn.in/blackjack_samsung-blackjack-proprietary-headphone-adapter potawatomi bingo and casino milwaukee
[url=http://xwn.in/keno_play-3-6-9-video-keno-online-free]frarance casino gambling[/url] lottery numbers dec 21 [url=http://xwn.in/gambling-online_southern-baptist-position-on-gambling]southern baptist position on gambling[/url]
did you know bingo questions http://xwn.in/casino-online_jb-casino
[url=http://xwn.in/casino-playing-cards_canasta-playing-cards-unabridged-rules]average salary for a blackjack dealer in atlantic city[/url] ute mountain casino [url=http://xwn.in/roulette_gambling-free-computer-roulette]gambling free computer roulette[/url]
florida lottery past results http://xwn.in/casino-playing-cards_playing-cards-glass slot gambling [url=http://xwn.in/jokers_jokers-cards]jokers cards[/url]

Anonymous said...

movie backgrounds with motion [url=http://moviestrawberry.com/films/film_black_zoo/]black zoo[/url] sydney white movie preview http://moviestrawberry.com/films/film_clambake/ chikas movie
torrent purab aur paschim movie [url=http://moviestrawberry.com/films/film_w_/]w [/url] star war rap movie http://moviestrawberry.com/films/film_dumb_and_dumberer_when_harry_met_lloyd/ joyride movie
the most controversial movie by lucy liu [url=http://moviestrawberry.com/films/film_the_suite_life_on_deck/]the suite life on deck[/url] epic movie
watch the condemned movie [url=http://moviestrawberry.com/films/film_the_man_who_sued_god/]the man who sued god[/url] sweet teen sex free movie home http://moviestrawberry.com/films/film_everybody_dies/ blockbuster movie posters
panty drawer movie [url=http://moviestrawberry.com/films/film_this_gun_for_hire/]this gun for hire[/url] mae movie http://moviestrawberry.com/films/film_gilmore_girls/ sydney white movie in chicago

Anonymous said...

she creature movie [url=http://moviestrawberry.com/films/film_walt_disney_world_christmas_day_parade/]walt disney world christmas day parade[/url] mpg files convert to other video or movie files http://moviestrawberry.com/films/film_the_weakest_link/ the movie beaches
the departed full movie [url=http://moviestrawberry.com/films/film_women/]women[/url] bloodsport movie http://moviestrawberry.com/genres/incredible_variety_of_films/?page=17 american pastime movie
centerstage movie and song with fever [url=http://moviestrawberry.com/films/film_shrink/]shrink[/url] tombraider 3 the movie
yonkers movie theater yonkers ny [url=http://moviestrawberry.com/films/film_tenebre/]tenebre[/url] freeporn movie http://moviestrawberry.com/films/film_screwballs/ is dragon wars the movie good
movie ogden utah [url=http://moviestrawberry.com/films/film_mirrors/]mirrors[/url] simpsons 400th episode reference movie http://moviestrawberry.com/films/film_the_saga_of_windwagon_smith/ cinefe movie theatre

Anonymous said...

Вопрос:   Я очень хочу встретиться с нормальной девушкой. Времени после учебы абсолютно не хватает, а в свободные дни очень часто нужно тоже  бегать по разным инстанциям. На улице знакомиться не прилично.  Пока что на сайтах вижу  преимущественно проституток. Порекомендуйте какой-то вариант, пожалуйста. Наперед огромное спасибо !!!.

Anonymous said...

шлюхи в свиблово проститутка таня красноярск интим знакомства ростова viewtopic p проститутки в мурманска беломорские бляди каневская интим секс знакомство алмата пьяная шлюха где сснять проститутку в Караганда минусинск секс знакомства шлюхи в соликамске шлюхи нижнекамск проститутки люберцы выезд

знакомства для транссексуалов проект мамба

Anonymous said...

проститутки город Белгород vip проститутки в екатеринбурге бисекс знакомства бесплатно такси бляди тюмень секс знакомства + в туапсе доброполье секс знакомства проститутки цены отзывы где снять проститутку в Юрге проститутки в городе петрозаводске секс знакомства мир любви пароли + к сайтам секс знакомств секс знакомства без материальной помощи секс знакомства регистрация без отправки смс

проститутки чеченские

Anonymous said...

What's Going down i am new to this, I stumbled upon this I've found It positively useful
and it has aided me out loads. I hope to give a contribution & aid different customers like its helped me.
Great job.

Feel free to surf to my weblog; Cheap Louis Vuitton Bags

Anonymous said...

Hmm is anyone else encountering problems with the pictures on this
blog loading? I'm trying to find out if its a problem on my end or if it's the blog.
Any responses would be greatly appreciated.


Here is my website: Cheap Oakley Sunglasses

Anonymous said...

Hello, i feel that i noticed you visited my weblog thus i came to go back the want?

.I'm attempting to in finding issues to enhance my web site!I suppose its adequate to make use of a few of your ideas!!

Also visit my weblog Evgeni Malkin Authentic Jersey

Anonymous said...

WOW just what I was searching for. Came here by searching for
liberate

my web page Air Jordan

Anonymous said...

I absolutely love your blog and find many of your post's to be just what I'm looking for.

Would you offer guest writers to write content available for you?
I wouldn't mind producing a post or elaborating on a number of the subjects you write with regards to here. Again, awesome site!

My web blog; Louis Vuitton Outlet

Anonymous said...

After I initially left a comment I seem to have clicked on the -Notify me when new
comments are added- checkbox and now whenever a comment is added
I recieve 4 emails with the same comment. There has to
be an easy method you are able to remove me from that service?
Cheers!

Stop by my webpage ... Air Max Pas Cher

Anonymous said...

Hello There. I discovered your blog using msn. This is a very neatly
written article. I'll make sure to bookmark it and come back to learn extra of your useful information. Thanks for the post. I'll definitely comeback.


my page: check this out

Anonymous said...

You should be a part of a contest for one of the greatest
sites online. I will recommend this blog!

My web page ... Sac Louis Vuitton

Anonymous said...

Aw, this was an extremely nice post. Taking a few minutes and actual effort
to generate a very good article… but what can I say… I procrastinate a lot
and don't manage to get nearly anything done.

My blog post - Sac Guess Pas Cher