Apart from people who smoke marijuana, exposure to secondhand marijuana smoke can also affect test result.

Researchers from a 2015 study of six smokers and six nonsmokers established that marijuana smoked in highly concentrated quantities could cause a positive urine drug test among people who never smoked, but were simply exposed to the smoke in a room that isn’t ventilated. Ventilation during marijuana exposure and how often exposure occurred are vital factors in the drug test result.

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A small study mimicked a more practical case by asking the study participants to spend three hours in a coffee shop where other patrons were smoking marijuana. After their exposure to secondhand marijuana smoke, the non-smoking participants were tested for THC. The test result indicated a small trace amount in their blood and urine, but it wasn’t enough to trigger a positive drug test result.

However, being near marijuana smoke often and in poorly ventilated areas may result in feeling a limited amount of the effects that the person smoking experiences.

Conversely, catching a scent of marijuana fragrance through your apartment window or entering a room where people were smoking several hours ago may not affect you.

Does Secondhand Marijuana Smoke Have Same Effect As Tobacco?
Researchers are yet to come up with much evidence to prove secondhand marijuana smoke is as harmful to your health as tobacco smoke. However, smoking marijuana regularly can cause damage to your immune system and your lungs, according to the American Lung Association.

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A 2016 study conducted on rats showed that just one minute of secondhand marijuana smoke damaged lung function for at least 90 minutes. This time is longer than the lungs affected by tobacco secondhand smoke.

So, the American Lung Association advises people to avoid exposure to secondhand marijuana smoke because secondhand marijuana smoke exposes you to the same toxic chemicals as smoking it directly.

Side effects of Secondhand Marijuana Smoke
Here are some side effects and symptoms of secondhand marijuana smoke exposure.

Dizziness
You may experience dizziness or faintness from being around marijuana smoke for an extended period, you may begin to feel lightheaded or dizzy.

Delayed reflexes
Smoking marijuana can slow your reaction time. High levels of THC in your blood from secondhand marijuana smoke might have the same effect.

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Depression
Scientists are still trying to establish the link between extreme marijuana exposure and mental health. The constant use of marijuana can trigger or worsen depression and some mental health conditions.

Lethargy

THC in marijuana gives the feeling of tranquility. This calmness can take the form of feeling exhausted or lethargic.

Conclusion
The medical use as well as the legal use of marijuana is fast changing, but doesn’t permit overly exposure. Marijuana should be used with caution and only if it’s legal in your state.

Pregnant or nursing women are advised to avoid secondhand exposure to marijuana smoke. People with mental health condition should also avoid marijuana smoke.

Source: http://healthdiary365.com/what-are-the-health-risks-of-inhaling-secondhand-marijuana-smoke/