Navigation Links
Marijuana Use Can Up Psychosis Risk
Date:2/27/2010

Study found the longer teens smoked, the more their mental health suffered

SATURDAY, Feb. 27 (HealthDay News) -- Long-term use of marijuana can lead to increased risk of developing hallucinations, delusions and psychosis, a new study shows.

Australian researchers asked nearly 3,100 young adults averaging about 20 years of age about marijuana use. They found that almost 18 percent reported using the drug for three or fewer years, about 16 percent for four to five years, and just over 14 percent for six or more years.

Among the participants, 65 had been diagnosed with a "non-affective psychosis" such as schizophrenia, and 233 had at least one positive item for hallucination on a diagnostic interview conducted for the study.

The researchers found there was an association between length of marijuana use and mental health.

"Compared with those who had never used cannabis, young adults who had six or more years since first use of cannabis [i.e., who commenced use when around 15 years or younger] were twice as likely to develop a non-affective psychosis and were four times as likely to have high scores on the Peters et al Delusions Inventory [a measure of delusion]," wrote Dr. John McGrath, of the Queensland Centre for Mental Health Research, Park Centre for Mental Health in Wacol, and colleagues. "There was a 'dose-response' relationship between the variables of interest: the longer the duration since the first cannabis use, the higher the risk of psychosis-related outcomes."

The study appears online March 1 and in the May print issue of the Archives of General Psychiatry.

But the association between psychosis and marijuana use is not simple, the researchers noted. They found that people who'd experienced hallucinations earlier in life were also more likely to have used marijuana longer and to use it more frequently.

"This demonstrates the complexity of the relationship: those individuals who were vulnerable to psychosis [i.e., those who had isolated psychotic symptoms] were more likely to commence cannabis use, which could then subsequently contribute to an increased risk of conversion to a non-affective psychotic disorder," wrote the study authors.

Further research is needed to learn more about the mechanisms underlying the association between psychosis and marijuana use, they concluded.

More information

The U.S. National Institute on Drug Abuse has more about marijuana.



-- Robert Preidt



SOURCE: JAMA/Archives journals, news release, March 1, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. International Merchant Advisors CEO Mel Roseman to Discuss New Medical Marijuana Clinics Live on CBS Radio Networks Big Biz Show February 22, 2010 at 1:40 pm PST
2. International Merchant Advisors Inc. to Open New Wellness Centers With Medical Marijuana Treatment Facilities
3. UC studies show marijuana has therapeutic value, reports to legislature
4. Marijuana ineffective as an Alzheimers treatment: UBC-Vancouver Coastal Health research
5. 215 Agenda Medical Marijuana Collective Located in Lake Forest, CA, has Donated $1,500 to Friends of the El Toro Library
6. Medical Marijuana Super Store Opens in East Oakland
7. Marijuana Compounds Could Beat Back Brain Cancer
8. Marijuana Munchies May Be Rooted in Biology
9. Teen Marijuana Use Might Have Lasting Effects on Mood, Anxiety
10. Pot and pop: New research finds stronger link between music and marijuana use among teens
11. Marijuana, Alcohol Addiction May Share Genes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/25/2016)... ... 2016 , ... Consumer access to organic foods and grower access to food ... whole grain cereals and other plant-based foods, will introduce the first consumer product (a ... processed by Hesco/Dakota Organic Products. , The transitional designation means the cereal was made ...
(Date:5/25/2016)... GA (PRWEB) , ... May 25, 2016 , ... ... solutions builder, has announced that it will join America's leading engineers at the ... be held at the Georgia World Congress Center. , Engineers, speakers and ...
(Date:5/25/2016)... ... 25, 2016 , ... American Spine in Frederick, Maryland is ... surgeries in the Montgomery County, Howard County and Washington, D.C. areas, renowned spine ... American Spine every Monday. He will also perform surgeries in our Germantown surgical ...
(Date:5/24/2016)... ... May 24, 2016 , ... Sterling Global Products is launching a ... patented refillable hanging wipe dispenser. The campaign kick-off video is located via this link ... 25, 2016. The goal is to raise $1,000 per day for a total of ...
(Date:5/24/2016)... ... May 24, 2016 , ... PhishLine, the ... joined the company as Vice President of Sales. Cifolelli’s primary responsibilities include ... sales in the rapidly expanding field of organizational social engineering. , “We ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... 2016 Los innovadores de ... mundo, introduce catéteres para la intervención de extremidades ... compañía global especializada en el suministro de soluciones ... cartera incluyendo productos para tratar la enfermedad arterial ... son los dispositivos de primera entrada de la ...
(Date:5/24/2016)... Een app die artsen over de hele ... behandelen, hun kennis kunnen delen en van elkaar kunnen ... revolutionaire MDLinking App, ontwikkeld door een internationale groep artsen ... en oncologisch chirurg dr. Gijs van Acker . ... dinsdag 24 mei officieel gepresenteerd op het Amsterdam Startup ...
(Date:5/23/2016)... 23, 2016 Transparency Market Research ... Pancreatic Insufficiency Market - Global Industry Analysis, Size, Share, ... to the report, the exocrine pancreatic insufficiency market is ... 2015 to 2023 to reach US$2.85 Bn by 2023. ... characterized by the deficiency of the exocrine pancreatic enzymes, ...
Breaking Medicine Technology: