Secondhand Marijuana Smoke Effects: Residual Pot Is Worse Than Smoke From Tobacco
New research published in the Journal of the American Heart Association, an open access journal affiliated with the American Heart Association, suggests secondhand marijuana smoke may be worse than secondhand cigarette smoke.
The study — conducted on rats by researchers at the University of California, San Francisco's Division of Cardiology — looked at blood vessel function before and after exposure to secondhand marijuana and tobacco smoke. The researchers found that inhaling secondhand marijuana smoke for one minute resulted in the rat’s arteries carrying blood less efficiently for at least 90 minutes. In comparison, rats exposed to secondhand tobacco smoke under similar conditions recovered within 30 minutes.
"While the effect is temporary for both cigarette and marijuana smoke, these temporary problems can turn into long-term problems if exposures occur often enough and may increase the chances of developing hardened and clogged arteries," said Matthew Springer, the study’s senior author...
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