How long after smoking can a nicotine test detect tobacco use?

It depends on how many cigarettes the individual smokes a day. Tobacco use might be detected for one to three days after stopping smoking for a person who smokes only one or two cigarettes a day. A heavy smoker may continue to show the presence of tobacco use for up to two weeks after stopping smoking. What happens if my teen says that the test is wrong? These tests promise over 99% accuracy. These are the same tests used by law enforcement, employers, etc. Make sure your child is not taking any medications that would interfere with the results. Confirmation testing should be done if there is any question about the results. My child refused the test. What do I do? I would assume that the test was positive and take whatever measures you would have taken if you had actually performed the test. A teen that is "clean" should be willing to prove it to you. Will exposure to passive marijuana smoke result in a positive marijuana test? Perhaps the most common excuse for a positive marijuana ...  more

It depends on how many cigarettes the individual smokes a day. Tobacco use might be detected for one to three days after stopping smoking for a person who smokes only one or two cigarettes a day. A heavy, chronic smoker may continue to show the presence of tobacco use for up to two weeks after stopping smoking.  more