NJ
A 51-year-old female asked:
How long can marijuana be detected in saliva after usage. smoked 12 days ago and have saliva swab for employment tomorrow.
2 doctor answers • 4 doctors weighed in

A Verified Doctoranswered
Addiction Medicine 51 years experience
Short time for 1 use: If it was a single use 12 days ago, it is unlikely that the test will be positive, and usually is negative within 72 hours. However, if you were a regular smoker, thc metabolites are soluble in fat, and tests (both urine and saliva) can remain positive for weeks and even months. If it was occasional use (once a week or less), it will most likely be negative. Am concerned about your risking ur job!
Created for people with ongoing healthcare needs but benefits everyone.
5.3k viewsReviewed >2 years ago

Dr. Dale Rottmananswered
Dentistry 46 years experience
Not long: Marijuana in the saliva is only detectible for a short time, probably 6-8 hours if smoking. If you are eating it, it could last longer. If a urine test is being done, the effects of marijuana could last up to 45 days.
Created for people with ongoing healthcare needs but benefits everyone.
5.3k viewsReviewed >2 years ago
Last updated Jul 3, 2017
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