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David Baxter

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Secondhand marijuana smoke and kids
by Claire McCarthy, MD, Harvard Health Blog
June 5, 2018

For years, we’ve talked about the danger to children of secondhand tobacco smoke. It makes asthma worse, increases the risk of respiratory and ear infections — and even increases the risk of sudden death in infants. We’ve had all sorts of educational campaigns for parents and caregivers, and have made some progress: between 2002 and 2015, smoking among parents of children less than 18 years old dropped from 27.6% to 20.2%. But now there is a new problem: secondhand marijuana smoke.

Studies show that when you are around someone who is smoking marijuana, the smoke gets into your system too. How much of it gets in depends on how close the person is, how many people are smoking and how much, how long you spend near them, and how much ventilation there is in the space. But research is clear that cannabinoids, the chemicals that cause the “high,” get into the bodies of people nearby — including children.

During the same time period that cigarette smoking around children came down more than 7%, marijuana smoking around children went up nearly 5%. With more and more states legalizing marijuana for recreational use, that number is likely to continue going up.

This is not good. Besides the fact that we don’t want children getting high, or exposed to the dangers of inhaled secondhand marijuana smoke, there is the additional concern about long-term effects on the brain. While research is still ongoing, there is evidence to suggest that when youth and young adults (whose brains are still developing) are exposed to marijuana, it may have permanent effects on executive function, memory, and even IQ.

This is not what we want for our children.

All the advice we give to parents who smoke tobacco applies to parents who smoke marijuana, including:

  • The best thing for you and your child is to not smoke at all. Talk to your doctor about ways to quit.
  • If you do smoke, don’t smoke around your child, ever.
  • Even if your child isn’t around, don’t smoke somewhere they will be, like your home or your car. Smoke lingers.
  • After you smoke, change your clothes and wash up. Again: smoke lingers.
As legal use of marijuana grows more common, we need to create the same kinds of rules and laws we’ve created to protect people from secondhand tobacco smoke.

Just because something is legal doesn’t mean it’s safe. And when we make choices that have risks, it’s not fair to impose those risks on other people — especially children, and especially when they could literally be harmed for the rest of their lives.
 

Daniel

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Secondhand marijuana smoke has even made my heartburn worse. I have not noticed any other effects, but the smoke is definitely an irritant or can be.
 

Daniel

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Marijuana's Secondhand Smoke Poses Risks To Heart And Lungs : Shots - Health News : NPR
March 19, 2018

...So far, Springer and his colleagues have published research demonstrating that just this one minute of exposure to secondhand smoke makes it harder for the rats' arteries to expand and allow a healthy flow of blood."

With tobacco products, this effect lasts about 30 minutes, and then the arteries recover their normal function. But if it happens over and over — as when a person is smoking cigarette after cigarette, for example — the arterial walls can become permanently damaged, and that damage can cause blood clots, heart attack or stroke.

Springer demonstrated that, at least in rats, the same physiological effect occurs after inhaling secondhand smoke from marijuana. And, the arteries take 90 minutes to recover compared to the 30 minutes with cigarette smoke...
 

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