Breathing in secondhand smoke can also affect the result. Note: There is always risk of secondhand exposure but exposure has steadily decreased in the US & Europe with greater regulatory oversight concerning smoke‐free indoor air quality. It is unusual to see cotinine levels > 1 ng/mL in US non-smokers. Might want to give it a full week just to be 100% sure. Average cotinine level for adult non-smokers in the US: 0.1 ng/mL. Cotinine, the chemical detected by the test, stays in your system for days. Unfortunately, you can’t use any nicotine products, including patches and other replacement therapies. Wikipedia says several days, up to one week. Most nicotine can be flushed out for a urine test within 3 days. Cotinine is a product formed after the chemical nicotine enters the body. After you stop chewing blood levels of cotinine drop within 7 days, they can take more than two weeks to drop to the level of a non-tobacco user, while urine levels will take 2-3 weeks more. Measuring cotinine in people’s blood is the most reliable way to determine exposure to nicotine for both smokers and nonsmokers exposed to environmental tobacco smoke (ETS). Withdrawal after stopping is not the best thing in the world, but if you quit for at least a week before the test, … Cotinine is usually the test of choice to evaluate tobacco use or exposure to tobacco smoke because it is stable and is only produced when nicotine is metabolized. If you smoke regularly, it may take up to three weeks for the cotinine to clear your system. If you use nicotine replacement medicine , such as gum or a patch, the cotinine test will not give an accurate result. ... in your blood for up to 10 days. Nicotine is a chemical found in tobacco products, including cigarettes and chewing tobacco. The sooner you quit, the better your chances on the test will be. If you haven't smoked or been exposed to nicotine in 7 to 10 days, your cotinine levels start to return to a normal level. Quit smoking. #5 How to pass a cotinine test? Do it as soon as possible. Cotinine has a half-life in the body of between 7 and 40 hours, while nicotine has a half-life of 1 to 4 hours. Cotinine levels in urine begin to return to normal about seven to 10 days after you last smoked, according to the University of Rochester Medical Center. Cotinine has an in vivo half-life of approximately 20 hours, and is typically detectable for several days (up to one week) after the use of tobacco. You already have: cotinine, the main metabolite of nicotine, is pretty much gone from blood in 2-3 days, and from urine in 3-4 days, and nothing should be detectable af ... Read More 0 Furthermore, the only source of cotinine is the degradation of nicotine; thus, further validating cotinine testing; The Nicotine (or Cotinine) Blood Test measures the levels of cotinine in blood. Testing urine samples for cotinine is the most widely used method of detection. Cotinine serves as a better indicator for nicotine levels than measuring nicotine directly due to its longer half-life and greater stability. The bloodstream of a nonsmoker with no secondhand smoke exposure has cotinine levels less than 1 ng/mL. If they find cotinine in your sample — you’re smoker. Try premium 7-day detox program. Also says level of cotinine is proportional to amount of exposure, so I'd think that if you work yourself down to a very low level of nic the week before (like 5-6 mg/ml), then switch to 0 maybe 3-4 days before the test, you'd probably be okay.

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