Secondhand marijuana smoke is a complex chemical mixture of smoke emitted from combusted marijuana and the smoke that is exhaled by the user. Secondhand marijuana smoke contains fine particulate matter that can be breathed deeply into the lungs.
Secondhand marijuana smoke contains many of the same cancer-causing substances and toxic chemicals as secondhand tobacco smoke. Some of the known carcinogens or toxins present in marijuana smoke include: acetaldehyde, ammonia arsenic, benzene, cadmium, chromium, formaldehyde, hydrogen cyanide, isoprene, lead, mercury, nickel, and quinoline.
Health risks of exposure to secondhand marijuana smoke: Since marijuana is illegal under federal law, there have been a limited number of studies examining health risks associated with marijuana use and exposure in the United States.
Secondhand smoke from combusted marijuana contains fine particulate matter that can be breathed deeply into the lungs, ii which can cause lung irritation, asthma attacks, and makes respiratory infections more likely.
Exposure to fine particulate matter can exacerbate health problems especially for people with respiratory conditions like asthma, bronchitis, or COPD. A study comparing indoor particulate matter 2. This diminished air quality was observed when marijuana was not being combusted on-site.
Researchers measured high levels of PM2. It reported that at least 33 individual constituents present in both marijuana smoke and tobacco smoke are Proposition 65 carcinogens.
Published studies on rats show that thirty minutes of exposure to secondhand marijuana smoke at levels comparable to those found in restaurants that allow cigarette smoking led to substantial impairment of blood vessel function. THC in blood was observed immediately after exposure and for up to three hours afterwards.
Four hours after the experiment ended, one nonsmoker tested positive for THC on a urine test with the same cutoff 50 nanograms per milliliter used in the Federal Workplace Drug Testing Program.
At intervals between two and 22 hours after the experiment, four of the six nonsmokers tested positive for THC in their urine at a lower cutoff 20 nanograms per milliliter sometimes used in commercial drug testing programs.
None of the nonsmokers exposed to secondhand smoke in the ventilated room tested positive for THC on either the more sensitive or the less sensitive urinalysis. All the cannabis smokers tested positive for THC afterward. Nonsmokers exposed to secondhand smoke with fans running reported no effects other than being hungry. When the nonsmokers were asked to duplicate grid patterns they saw on a computer monitor or perform a basic numbers drill, those in the unventilated study responded faster but made more mistakes than they did before they were exposed to the cannabis smoke, the researchers found.
Cone, Ph. Department of Health and Human Services that sets standards for federal workplace drug testing. Learn more: What are the risks of inhaling secondhand tobacco smoke? If you are in an emergency situation, this toll-free, hour hotline can help you get through this difficult time: call TALK , or visit the Suicide Prevention Lifeline. We also have step by step guides on what to do to help yourself, a friend or a family member.
Of the more than chemicals in marijuana, THC is the main one that causes a person to feel high Marijuana withdrawal can lead to symptoms like depression, anxiety, irritability, trouble sleeping, and more. Teens who use nicotine, alcohol, and marijuana have two brain areas that are smaller than average when they become adults.
National Institutes of Health. If you're looking to know whether secondhand cannabis smoke can enter your system or if you'll ever be able to attend a Grateful Dead tribute concert without getting blazed, this is the guide for you.
As with many things weed, the answer is both yes and no according to a Johns Hopkins University study. Researchers started with a dozen people, six of whom were cannabis smokers and six who were non-smokers. In the first experiment, all 12 subjects spent an hour together in a small unventilated room, during which time each smoker puffed through 10 joints, each with a THC content of Afterward, the non-smokers reported feeling pleasant, more tired, and less alert.
And sure enough, their blood and urine tests came up positive for THC. The second experiment repeated the scenario, but this time in a room with ventilation. The non-smokers in this experiment later said they felt hungry, but none of them tested positive for any noticeable amount of THC. To be fair, the study did also finish up around lunchtime. Outside of that very limited scope, any contact high you think you might be feeling due to secondhand cannabis smoke is likely a result of the power of suggestion.
You can't get high from catching a whiff of someone's joint while walking down the street, but you will feel some effects if you are sitting in an unventilated enclosure filled with smoke. Some people do this intentionally, and those people call it hotboxing.
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