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Smokeless Tobacco

How long does smokeless tobacco test positive in a blood test?

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April 27, 2008 9:55PM

Researchers recruited 131 smokers-37 Chinese-Americans, 40 Latinos,

and 54 whites-for an analysis. Each volunteer gave a blood sample

before receiving an intravenous infusion of nicotine. Nicotine is cleared from the blood by liver enzymes that convert it to

its metabolite cotinine. Blood analysis showed that it took an average

of 152 minutes for half the injected nicotine to degrade in the blood

of the Chinese-Americans in this study. Nicotine's half-life in whites

and Latinos was 134 and 122 minutes, respectively. So essentially it will take around a week or so to be close to completely gone from the system of a pack a day smoker.