Doctor insights on:
How Long Does Nicotine Stay In The Bloodstream
What type of blood test is used to check for nicotine in the bloodstream? And how long is nicotine detectable in blood stream?
Nicotine: Either blood nicotine levels or its presence or absence can be determined. The length of time that nicotine stays in the body and that can be a reliable indicator of nicotine use, depends on the amount of tobacco smoked, the number of years smoking tobacco, and the type of nicotine test performed. It can be as short as 2 days, or as long as 3 months. ...Read moreSee 1 more doctor answer
How long does it take for nicotine to leave your body (urine and blood stream) after you stop smoking?
How long does it take for nicotine to leave your body (urine and blood stream) after you've stop smoking?
It varies: Nicotine metabolism is complex. Most nicotine is metabolized in the body to co-nicotine, and this is what is tested for. Nictotine is 1/2 gone after 2 hours, co-nicotine about 20. It takes about 5 1/2 lives for a drug to be "97% gone". 10 half lives for 99.9% another source says a urine test can be positive 7 to 20 days after smoking. ...Read moreSee 1 more doctor answer
Variable, but the: Companies that manufacture the tests say that saliva can remain positive for 7-10 days, whereas blood and urine tests are generally negative within 3-5 days. Nicotine per se stays only for a few minutes, and is metabolized to cotinine, an inactive metabolite, which is what is generally tested for. Thats why people smoke 20-30 puffs for each cigarette, and smoke 20 or more cigarettes per day. ...Read more
3-4 days: A single cigarette will give a positive urine cotinine for 1-2 days, regular smokers generally 3-4 and rarely 5 days, and blood tests can detect it for about the same time. Oral swabs may detect if for a bit longer, up to 7-10 days, and it can be found in hair drug testing for months, depending on the length of hair chosen. ...Read more
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