How Long Does Nicotine Stay in the Blood?

Answer

Nicotine is estimated to have a half life of two hours in the blood. However, smoking represents a multiple dosing with considerable accumulation. Therefore, the nicotine in blood would persist at significant levels for six to eight hours after smoking has stopped.
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Nicotine stays in the body for about three to four days, before it can be detected, but traces of nicotine can be detected in a urine blood test after 15 to 20 ...
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