Billboard and Storefront Ads for Cannabis Linked to Problematic Use in Teens
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PISCATAWAY, N.J., April 8, 2021 /PRNewswire/ -- Adolescents who frequently see billboard or storefront advertisements for recreational cannabis are more likely to use the drug weekly and to have symptoms of a cannabis use disorder, according to a new study in the Journal of Studies on Alcohol and Drugs.

Despite use being illegal for those below age 21 even in states that have approved recreational marijuana, "legalization may alter the ways that youth use cannabis," write the study authors, led by Pamela J. Trangenstein, Ph.D., M.P.H., of the University of North Carolina at Chapel Hill.

An increasing number of states have legalized recreational marijuana, and public concern over the risks of cannabis use has declined in recent years, Trangenstein and colleagues note. However, research continues to find cannabis use associated with negative outcomes, including neuropsychiatric conditions, automobile crashes and substance use disorders.

And marijuana use among teens may be more problematic than in adults. "[C]annabinoid receptors are crucial for brain development, which is why cannabis use during adolescence carries special risk," the authors write.

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To conduct their research, the investigators used ads on social media sites and apps to recruit 172 teens, ages 15 to 19, who lived in states with legal recreational marijuana and who had used the drug at least once.

Participants answered questions about their use of marijuana and their exposure to its marketing. The latter included seeing advertisements on billboards and storefronts as well as Instagram and Facebook, if they owned or were likely to buy cannabis-branded merchandise (e.g., hats, sunglasses or t-shirts with cannabis logos or other images) and if they reported having a favorite brand or strain of cannabis or related paraphernalia.

Compared with those who never saw billboard or storefront ads, those who said they saw them "most of the time" or "always" had seven times the odds of frequent cannabis use and nearly six times the odds of having symptoms of cannabis use disorder. Having a favorite brand was linked to three times the odds of frequent use and symptoms of cannabis use disorder compared with those who did not have a preferred brand.

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Further, those who owned or were likely to own cannabis-branded merchandise had 23 times the odds of frequent use as those who did not own and did not plan to own such merchandise.

Unexpectedly, teens who occasionally or frequently saw cannabis ads on Instagram were 85% and 93% less likely, respectively, to use marijuana frequently compared with those who never saw such promotions.

Trangenstein and colleagues note that, although research into cannabis marketing is newer, studies on alcohol and tobacco advertising indicate that "associations between ads and use may not stop at experimentation—ad exposure may facilitate progression toward problematic use, and their association may even be causal."

As states open up access to recreational marijuana for adults, the researchers say, the collateral effect on youth should not be ignored.

Press contact:
Jennie Saia
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Cannabis billboard
Cannabis billboard Seattle 2016 (credit: adrienblanc, via Wikimedia Commons, Creative Commons Attribution 2.0)

SOURCE Journal of Studies on Alcohol and Drugs
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