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A 18-year-old female asked:

I have to do a saliva test and urine sample to see if i have stopped smoking how long would i need to stop for so it can't be detected?

2 doctor answers6 doctors weighed in
Dr. J. Blake Perkins
Dentistry 22 years experience
Depends: Nicotine can stay in your system from as little as 3-4 days, up to 3 weeks. It also depends on what you are smoking...If it is marijuana, thats a different story...
Dr. Earl Sandroff
Dentistry 44 years experience
A few weeks: Depending on what you are smoking...Wait at least 4-6 weeks to be safe. But honestly...Urine and saliva tests are the say ones to pass. The deal breaker could be a hair analysis. That is getting to be more common and more reliable about a person's past.

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Last updated Nov 10, 2014

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