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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Does Cigarette Smoking Interfere With Blue Dot Swab Test?

I took a blue dot swab test it is on the way to the lab.heres the problem I smoke two blunts two hours before the test.thought it was going to be ur.but I smoke a cigarette then I washed my mouth with listerine stop to the store ate some peanuts and drunk a little bit of water but while I was testing my mouth was dry?please answer
posted on Sun, 3 Aug 2014
Twitter Tue, 1 Nov 2016 Answered on
Twitter Wed, 2 Nov 2016 Last reviewed on
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Addiction Medicine Specialist,  's  Response
Cannot believe you would pass the test. The blue dot test is a saliva test and shows up marijuana in the system. It is more similar to the amount in the blood (which will be sky high 2 hrs after use) and fades faster than the urinary test. No cigarettes do not interfere to make the test negative. It might foul it up but that is doubtful since it is used in many people who smoke a lot of things.
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Does Cigarette Smoking Interfere With Blue Dot Swab Test?

Cannot believe you would pass the test. The blue dot test is a saliva test and shows up marijuana in the system. It is more similar to the amount in the blood (which will be sky high 2 hrs after use) and fades faster than the urinary test. No cigarettes do not interfere to make the test negative. It might foul it up but that is doubtful since it is used in many people who smoke a lot of things.