No the Listerine will not effect your test results and a week is plenty of time on the marijuana.
Deige Reviewed by Deige on . Saliva Results Effected ??? hey, this might sound silly but- I'm wondering if a saliva cotton swab test could be negatively effected, or "red flagged" if they detected a substance like listerine?? For pre-employment, I was tipped prior to a cotton swab test. I havnt smoked in over a week... but before smoked heavily. Being paranoid, Rinsed with listerine about 30 mins prior to the test. A friend said the alchohol content of the listerine could be bad. Any thoughts? Im actually not worried about the weed... just that Rating: 5