A member asked:

How long does cotinine remain detectable in your hair, urine, blood and saliva?

7 doctors weighed in across 2 answers
Dr. Paul Grin answered

Specializes in Pain Management

1 week: Different people metabolize nicotine at different rates. However, cotinine has a half-life of approximately 18-27 hours. It takes approximately 6 half lives for a drug to be eliminated from your system. 27*6/24 = 6.75 days. The cotinine will stay in your system for 1 week.

Answered 6/27/2019

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Dr. Heidi Fowler answered

Specializes in Psychiatry

Cotinine: “When someone stops using tobacco and nicotine products, it can take more than two weeks for the blood level of cotinine to drop to the level that a non-tobacco user would have and several weeks more for the urine level to decrease to a very low concentration.” REF: http://labtestsonline.org/understanding/analytes/nicotine/tab/test/ “Nicotine & cotinine can take up to four days to be fully flush

Answered 8/28/2019

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