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:2/10/2016)... ... 2016 , ... Gout is like no other joint pain. It strikes suddenly, ... intense swelling and redness. It is triggered by the crystallization of uric acid within ... most susceptible, according to the February 2016 issue of Harvard Men's Health Watch. , ...
(Date:2/10/2016)... MI (PRWEB) , ... February 10, 2016 , ... ... Apifiny® across their network of laboratory service centers across the country. Launched ... to aid clinicians in the detection of prostate cancer. Apifiny order volume exceeded 3,000 ...
(Date:2/10/2016)... ... February 10, 2016 , ... Pediatric therapists are challenged ... Research shows that the Goal Attainment Scale (GAS) captures 20% more change in ... learn more about the Goal Attainment Scale, Education Resources Inc. is offering a ...
(Date:2/10/2016)... , ... February 10, 2016 , ... ... will attend the Ohio Safety Congress and Expo event March 9-11, 2016. Hosted ... Greater Columbus Convention Center. , As the longest running and largest worker's ...
(Date:2/10/2016)... ... February 10, 2016 , ... ... Everseat digital self-scheduling readily available to physicians. The integration will enable Allscripts ... and select appointments via Everseat’s free mobile app. , The partnership gives Everseat ...
Breaking Medicine News(10 mins):
(Date:2/10/2016)... PUNE, India , February 10, 2016 ... to a new market research report "Pharmaceutical Packaging Equipment ... Packaging, Wrapping, Labeling & Serialization), by Product Type (Tablet, ... to 2020", published by MarketsandMarkets, studies the global market during ... is expected to grow at a CAGR of 6.9% ...
(Date:2/10/2016)... February 10, 2016 ... Targeted Therapeutics and Companion Diagnostic Market to 2019 ... and Environment" research report indicates that the core ... billion by 2020 growing at a CAGR of ... diagnostics and targeted therapeutics and is dominated by ...
(Date:2/9/2016)...  Misonix, Inc. (NASDAQ: MSON ), an ... markets innovative therapeutic ultrasonic products for spine surgery, ... surgery and other surgical applications, today announced financial ... half of fiscal year 2016 ended December 31, ... --> Highlights for the second quarter and ...
Breaking Medicine Technology: