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Doctor insights on: Nicotine Body Urine Blood Stream Stop Smoking

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Dr. Heidi Fowler
840 doctors shared insights

Quit Smoking (Definition)

Quitting smoking is the single most important decision smokers can make to improve their health. Preparing a quit-smoking plan and enlisting support from your doctor and your loved ones can greatly improve your chances of success. Your doctor can help you decide if over-the-counter or prescription medications can help. Pick a quit day a few weeks ahead and put it on your calendar. Plan how you're going deal with situations that make you want to smoke. Take advantage of support from family, friends, and co-workers, and consider joining a smoking cessation program so that you don't ...Read more


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How long does it take for nicotine to leave your body (urine and blood stream) after you've 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 more

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How long does nicotine stay in blood stream after you quit smoking?

How long does nicotine stay in blood stream after you quit smoking?

About one week: Our bodies metabolize many impurities that we introduce by various means, eating, drinking, breathing, etc. The time required varies for different substances, but for nicotine, it's about a week. ...Read more

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Stop smoking at 11:59pm on 03-04-16, I have a blood,urine and mouth test for nicotine. The test is between 3-14/18-2016 will i pass?

Stop smoking at 11:59pm on 03-04-16, I have a blood,urine and mouth test for nicotine. The test is between 3-14/18-2016 will i pass?

Yes, although...: Nicotine stays in urine and saliva for up to 4 days. A metabolite, cotitine, is detectable in blood for up to 10 days, so you should pass (there's a very slight chance of a positive in blood if done the 14th). Congratulations on stopping smoking; while you may have done it to pass this test PLEASE don't resume. Smoking is one of the worst things for your health! See http://tinyurl.com/meuts3g ...Read more

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How long is it recommended to stop smoking before a facelift, and how long does nicotine stay in blood system?

As soon as possible: You should stop smoking for at least 2 weeks before and continue at least 2 weeks after the procedure. Although nicotine only lasts 24 hrs in your system, the detrimental effects may last much longer. Smoking increases risks of complications and prolongs the healing process. Abstaining is one thing that you control that can optimize your results and ensure a safer procedure. ...Read more

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They are going to take a blood sample for nicotine in 14 days is there any chance that I can show up nicotine negative if I stop smoking now?

They are going to take a blood sample for nicotine in 14 days is there any chance that I can show up nicotine negative if I stop smoking now?

Yes: It's worth trying. Cotinine, the chemical being checked for, is reportedly detectable for several days (up to one week) after the use of tobacco. So, two weeks later, there's a good chance for a negative test, especially if one was not a heavy smoker. ...Read more

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I quit smoking 4 days ago. How can I begin to detox my body to rid itself of thc in blood and urine?

I quit smoking 4 days ago. How can I begin to detox my body to rid itself of thc in blood and urine?

If you are a chronic: smoker, THC is stored in your body fat & released into your blood over time. Use the calculator on www.marijuanacentral.com/content/how-long-does-marijuana-stay-in-your-system.html to determine from your weight, amount & duration of use & other factors to estimate how long your blood, urine & hair tests will remain positive. The authors are anti-DUI testing; otherwise, the info is pretty good. ...Read more

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I am an overweight 40 yo female and have quit smoking . I am wondering after those 2 weeks will nicotine still be in my urine since my BMI is higher.?

I am an overweight 40 yo female and have quit smoking .  I am wondering after those 2 weeks will nicotine still be in my urine since my BMI is higher.?

Should be gone: The listed half life ( time until 1/2 is gone from your system) of nicotine is 2 hours in adults. 2 after stopping only 1/2 is left, then 1/4 and so forth. By two weeks out it is unlikely that any nicotine remains. If you work in close proximity to smokers or wear outfits that retain any of the smoky smell, trace amounts of nicotine can remain in your urine for as long as you are exposed. ...Read more

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I quit smoking cigarettes 26 days ago will I pass a nicotine test in urine and swabbing of my mouth?

I quit smoking cigarettes 26 days ago will I pass a nicotine test in urine and swabbing of my mouth?

No nicotine: If you did not take any nicotine, either by smoking, chewing, gum or patches, you should pass the test. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. ...Read more

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When after you quit smoking cigarettes will it show up in blood or urine test?

Very Variable: If you quit smoking, your tissues can quickly recover from the damage especially if you have been eating foods with lots of antioxidants like red, orange, yellow fruits and same color plus green leafy vegetables...So the cancer cells may not develop at all unless you have a strong family history of cancer and your immunity has been severely compromised. ...Read more

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Im trying to quit smoking with patches is it the nicotine that constrics blood vessels or is it the other toxins in the smoke?

Im trying to quit smoking  with patches is it the nicotine that constrics blood vessels or is it the other toxins in the smoke?

Nicotine constricts: While there might be a little cross-over, in general nicotine causes the vascular effects including constriction of blood vessels, & tars/other chemicals contribute carcinogens, promoting cancer. So in using the patch, you still get the effects of nicotine (hopefully at a lower dose than a cigarette) but are spared the hundreds of other chemicals. Go ahead & use the patches ... but get off ASAP! ...Read more

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I had quit smoking, i smoked 10 cigs in 1 day. Can i pass a nicotine/metabolite blood test 4 days later?

I had quit smoking, i smoked 10 cigs in 1 day. Can i pass a nicotine/metabolite blood test 4 days later?

You should: Am not aware of people preferring blood tests to urine tests for cotinine, particularly since it can be found in blood only for a few hours after smoking, while it persists in urine for several days. In any case, testing should be negative 4 days later. More important than passing the test is actually quitting smoking, and taking care of your health. Please quit and stay quit! ...Read more

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How long does it take for cotinine to leave blood and urine after you quit smoking?

How long does it take for cotinine to leave blood and urine after you quit smoking?

Cotinine test: This will depend on which test they are using so ask the tester. Do no chew or dip as this will show up as well. ...Read more

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I have a surgery coming up they want me to quit smoking they're going to test my blood for nicotine when do I have to quit in order for nicotine to not show up?

Ten days or more: Cotinine, a metabolite of nicotine is the chemical assayed in blood or urine tests for tobacco use. It may be positive for ten days since last exposure in a heavy user. Now would be a good time to quit for good. ...Read more

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I had quit smoking for 2 weeks they tested my blood for nicotine will it still show up in the test?

Not likely: If you have not been exposed to second hand smoke and did not take nicotine in any other form, e.g., nicotine patch or gum, the result should be clear. While you have managed to be smoke free for two weeks, you will do a world of good for yourself by not smoking at all. I wish you the best in your efforts to quit smoking. ...Read more

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How quickly is nicotine detectable in the blood stream following inhalation of cigarette smoke?

Very quickly: Inhaling a chemical gets it into your bloodstream quickly. I'm not sure of a absolute time. With all that is known about cigarette smoking and cancer/emphysema, why do you want it there at all. ...Read more

Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


Dr. Dean Giannone
1,106 doctors shared insights

Smoking Cessation (Definition)

Smoking any tobacco product is harmful to your baby, including "light" cigarettes, cigars (and marijuana). Like any addiction, quitting tobacco is difficult, especially if you are acting alone. Most smokers find it hard to break all the habits or ties they've built into their lives around smoking. Quitting smoking does reduce a number of ...Read more