National Institutes of Health. Drug Topics. More Drug Topics. Quick Links. About NIDA. The THC potency in today's marijuana flowers is far greater than the weed from the s and s, therefore much of the early research produced from studying secondhand highs may be outdated. While there's an abundance of research demonstrating the adverse health effects of secondhand exposure to cigarette smoke, there is little evidence to suggest that secondhand marijuana smoke carries the same detrimental health risks as tobacco smoke.
Considering that past research has found marijuana smoke to be less carcinogenic than cigarette smoke , there doesn't seem to be an immediate public health concern regarding the effects of secondhand weed smoke. Bottom line: the research may be outdated, but as long as you're not stuck in a poorly ventilated room during a heavy smoke session, you shouldn't be concerned about feeling stoned or having THC enter your system.
It's highly unlikely you'll experience a secondhand high or have cannabis byproducts show up on a drug screening if you pass by some dissipating marijuana smoke. As the Johns Hopkins University research shows, in order to catch a secondhand high, you'd have to be under extreme conditions that lack proper ventilation.
Nonetheless, weed smokers should still be respectful of people who don't consume cannabis. The next time you spark one up, try to be aware of your surroundings and make an attempt to keep the smoke and strong odor away from non-smokers.
To enjoy a smoking session without affecting non-partaking neighbors, cannabis users should spark up in well-ventilated areas to ensure passive inhalers will not feel the effects of the smoke or test positive for weed. However, you may feel some barely-there, calming effects or the faintest whisper of energy after deeply inhaling some terpene-rich weed. Terpenes are the compounds that give all kinds of plants — including marijuana — their aroma and flavor. In the same way you may feel a subtle increase in focus after smelling lemons, which are rich in the terpene limonene, or some calming effects after smelling linalool-rich lavender, you may simply feel happy smelling good weed.
But high? Absolutely not. By checking this box you consent to Weedmaps' collection of your email address for the limited purpose of subscribing to Weedmaps' email communications. The information contained in this site is provided for informational purposes only, and should not be construed as medical or legal advice.
This may also include apartments. Marijuana and Tobacco Coexposure in Hospitalized Children. Hosp Pediatr. Evidence on the Carcinogenity of Marijuana Smoke.
Chem Res Toxicol. J Am Heart Assoc. Published Jul Non-smoker exposure to secondhand cannabis smoke. Urine screening and confirmation results. J Anal Toxicol. Health effects of exposure to second- and third-hand marijuana smoke: a systematic review. CMAJ Open. Drug Alcohol Depend.
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