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:4/24/2017)... ... April 24, 2017 , ... ... seeking public support to bring their novel lifesaving device for the everyday use ... with medical-grade sensors, specially designed to read a child’s vital signs, and detect ...
(Date:4/24/2017)... , ... April 24, 2017 , ... ... are expected to be diagnosed globally; approximately 25,000 of them will be malignant.(1) ... greater use of this type of healthcare model in the diagnosis and treatment ...
(Date:4/24/2017)... ... April 24, 2017 , ... Come to PAINWeekEnd (PWE) Tampa on May 20 ... an educational and exciting 2-day program. , An attendee at a recent PAINWeekEnd ... approach patients” about the course entitled Ain't Misbehavin': Decreasing and Managing Pain Patient Aberrant ...
(Date:4/24/2017)... ... April 24, 2017 , ... “Learning to Use Your SPIRITUAL COMPASS To Navigate ... Use Your SPIRITUAL COMPASS To Navigate Life Issues” is the creation of published author, ... the Board of Directors for CONTACT USA, and former member of the American Association ...
(Date:4/24/2017)... (PRWEB) , ... April 24, 2017 , ... ... the development of next generation neuro-thrombectomy systems for the treatment of Acute Ischemic ... manufacture its ANCD BRAIN device as the product advances towards regulatory and clinical ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... April 19, 2017  Sorrento Therapeutics, Inc. (NASDAQ: ... biopharmaceutical company developing new treatments for cancer and ... of its previously announced underwritten public offering of ... public offering price of $2.00 per share, before ... expenses payable by Sorrento.  The net proceeds to ...
(Date:4/18/2017)... April 18, 2017  Cardinal Health (NYSE: ... fiscal 2017 earnings per share (EPS) guidance and providing ... is in conjunction with this morning,s announcement of the ... and Nutritional Insufficiency businesses. Cardinal Health now ... will be at the bottom of its previous guidance ...
(Date:4/18/2017)... BLOOMINGTON, Minn. , April 18, 2017 ... ) ("Imprimis"), an ophthalmology-focused pharmaceutical company, and Cameron ... announced the signing of a three-year exclusive sales ... deploy a dedicated sales team to introduce Imprimis, ... primarily focused in 13 states in the U.S. ...
Breaking Medicine Technology: