Apr 30 2009
Tobacco and Marijuana Smoking Increases Risk of Chronic Respiratory Disorder
Everyone knows how detrimental cigarette smoking can be to one’s health but when the risks are heightened when tobacco is smoked with marijuana. According to a new study that was published in the Canadian Medical Association Journal (CMAJ), “the risk of respiratory symptoms and chronic obstructive pulmonary disease (COPD) increases when smoking both tobacco and marijuana.” The said risks where not only linked to marijuana use.
The study used an older population with the incidence of smoking tobacco lower in more than eight hundred participants from Vancouver. Subjects were aged 40 years and older. The said research was conducted as a part of the Burden of Obstructive Lung Disease (BOLD) Initiative which was created to determine the incidence of COPD in the age group.
Chronic obstructive pulmonary disease is characterized by narrowed airways and deteriorating lungs. The condition is currently linked to high death rates.
The authors of the study defined smokers as those who have reportedly smoked more than 365 cigarettes in their lifetime as well as people who have only smoked marijuana.
Tobacco smoking was identified as a risk factor for COPD. Moreover, individuals who smoked both marijuana and tobacco had a higher risk of developing respiratory conditions. The risk for COPD was three times higher as per the spirometric testing used in the study.
“We were able to detect a significant synergistic effect between marijuana smoking and tobacco smoking,” says study author Dr. Wan Tan of the University of British Columbia and the St. Paul’s Hospital. “This effect suggests that smoking marijuana (at least in relatively low doses) may act as a primer, or sensitizer, in the airways to amplify the adverse effects of tobacco on respiratory health.”
However, the research was only limited to the available information regarding differences in marijuana strength as well as in the variety of intake methods and on how many individuals mix cannabis and tobacco in the same cigarette.
Dr. Donald Tashkin of the University of California – Los Angeles said that the study’s findings contribute to the evidence that links marijuana use to COPD as Tan and his colleagues focused on the older age group. Old age has been identified as a risk factor for COPD before.
Previous studies have been unable to identify the additive effect of tobacco and marijuana on chronic respiratory conditions among young smokers. “We can be close to concluding that marijuana smoking by itself does not lead to COPD,” Tashkin says.
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