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how long does cotinine stay in blood and urine after being around second hand smoke?

I do not smoke but all of my friends do. I have to take a blood and urine test on saturday for cotinine for my health insurance. I just read that cotinine can get in your system just from second hand smoke.


Cotinine has an in vivo half life of approximately 20 hours, and is typically detectable for several days to up to one week after the use of tobacco. The level of cotinine in the blood is proportionate to the amount of exposure to tobacco smoke, so it is a valuable indicator of tobacco smoke exposure, including secondary (passive) smoke. People who smoke menthol cigarettes may retain cotinine in the blood for a longer period because menthol can compete with cotinine enzymatic metabolism. Genetic encoding of liver enzymes may also play a role, as black people routinely register higher blood cotinine levels than white people. Several variable factors, such as menthol cigarette preference and puff size, suggest that the explanation for this difference may be more complex than gender or race.

Insidermedicine In 60 - June 7, 2010


air laws appear to protect children from secondhand smoke. Researchers studied cotinine levels in nearly 12000 non smoking children, finding that ...

I need to take a blood test for cotinine and I smoke 8to9 cigarettes a day there any drinkormedicine tht clear?

I need to past this blood test within a month and I am willing to stop smoking but can I get a drink from GNC that will cleanse my system with in a day and will it work to get the cotinine out my system ( for the blood test? ) Please help!






They don't take a blood test - cotinine shows up in your urine.

How can you pass an at home Tobacco use test (Cotinine test)?

I am bieng tested at work for Tobacco use, which is called a cotinine test I believe, and I dont smoke a lot, but I really want to keep my job.
What are some ways you can pass a urine test for that? Ive heard of fake urine, or flushing out your system, etc. Anything that has worked for you? This is going to sound really gross, but as long as were bieng open here- does animal urine work? Any information would be great, thank you.


Go to your local health food store. There are two methods you can use. One is a body flush which takes about a week (and costs about $100). The other is a diuretic (much cheaper). The diuretic comes usually as a drink that tastes awful. It will make you urinate (about every 5 minutes for 2 to 3 hours).

Both will make you clean. But it they are testing for other things, such as blood sugar, cholesterol, etc. then you must go with the full body flush. The diuretic will make it look like you are a diabetic with the potential for heart disease.

What cotinine urine level is considered that of a non-smoker?



Cotinine is a metabolite of nicotine, so it would stand to reason that a non-smoker would have no cotinine in their system..

how long doe's cotinine stay in your system after your last cigerette, i had to quit for surgery, but it tookt?

i had to quit smoking for pre-surgery on my back, how long doe's it take to get the cotinine out of your system after your last cigerette?


I don't even know what cotinine is. Nicotine? Most of it leaves your system within 24 hours.


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    Objectives: This study was conducted to examine the effectiveness of a new salivary collection device (psi10 mm x 25 mm) made of polypropylene and polyethylene polymers (Salisoft((R))). Method: Experiment 1; We measured the absorption capacity of the new device by two methods. Next, we examined whether the device affected the pH of 0.1 M NaHCO(3) solution (pH 8.7) and 0.1 M sodium phosphate buffer solution (pH 6.0). Experiment 2; We compared three saliva collection methods: by passive drool, using a cotton device (Salivette((R))), and using the new device. Saliva samples were collected from twelve men (average age, 31.5 +/- 17.1 years). Saliva samples were assayed for cotinine, cortisol, dehydroepiandrosterone,...

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    Huffington Post - Apr 06, 2011

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    Medscape - Apr 12, 2011

    In a national survey study of more than 2000 nonsmokers between the ages of 8 and 15 years, investigators found that serum cotinine levels, signifying SHS exposure, were positively associated with symptoms of all these disorders — and were especially and morenbsp;raquo;
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    Reuters - Apr 07, 2011

    Secondhand smoke may affect kids#39; mental healthResearchers measured the level of cotinine - which forms when nicotine in tobacco breaks down - in each kid#39;s blood to find which kids had been exposed to secondhand smoke. Kids with the highest levels of cotinine were considered to be smokers and morenbsp;raquo;
    Secondhand smoke isnt just bad for kids bodies, its bad for their brains

    Los Angeles Times - Apr 05, 2011

    Secondhand smoke isnt just bad for kids bodies, its bad for their brains Secondhand smoke isn#39;t just bad for kids#39; bodies, it#39;s bad for their brainsAs part of the study, the kids were asked to provide blood samples; those who were exposed to secondhand smoke had higher levels of the cotinine, which is produced as the body metabolizes nicotine. The kids were also assessed for a variety of mental and morenbsp;raquo;
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    ParentDish - Apr 08, 2011

    The researchers studies 3000 kids between the ages of 8 and 15, measuring the level of cotinine (which forms in the body after the breakdown of nicotine) to find which children had been exposed to secondhand smoke. Kids with the highest levels of Secondhand Smoke May Cause Mental Disorders among Kidsall 7 news articlesnbsp;raquo;
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    Cambridge Network - Apr 12, 2011

    Our CLIA certified testing lab measures stress hormones, immune markers, genetic markers, reproductive hormones, cytokines and other salivary biomarkers such as cotinine, melatonin and alpha amylase. We have the experience and references to deliver the and morenbsp;raquo;
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    Opposing Views - Apr 12, 2011

    To do this, they measured the levels of cotinine in each child#39;s blood to determine who had, and who hadn#39;t been exposed to secondhand smoke. After determining the levels of cotine in the children involved, researchers interviewed all of the kids to and morenbsp;raquo;