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A 30-year-old member asked:

How long does thc stay in your saliva?

3 doctor answers4 doctors weighed in
Dr. Evans Prieston
Pharmacology 45 years experience
THC: All of the cannabinoids have a very long half-life in the body. In the case of thc in saliva, i would expect that it would be detectable for up to 30 days or longer since the last dose.
Dr. Heidi Fowler
Psychiatry 26 years experience
In “Pharmacokinetics: Of cannabinoids” by mcgilveray ij it is stated “saliva testing is a newer, less proven technology. The sensitivity of saliva tests is not well established in the case of marijuana. In theory, they are supposed to detect recent use, but this may range from several hours to over a day. They are supposed to detect secretions from inside the oral tissues that cannot be washed out with mouthwash.”.
Dr. Pamela Pappas
Psychiatry 43 years experience
THC in saliva: Thc is generally detectable in saliva for 1-10 days. However, urine testing is the more common approach -- and length of detectability depends on frequency of use.

Similar questions

Warren, MI
A 21-year-old male asked:

How long does THC stay in the saliva after using it only once?

1 doctor answer4 doctors weighed in
Dr. Jalal Zuberi
Pediatrics 46 years experience
Less than 24 hrs: Unless someone repeats using the weed within 14-16 hrs it generally becomes undetectable from saliva.
Dr. Jan Lei Iwata
Dr. Jan Lei Iwata commented
Ophthalmology 27 years experience
Agreed. Blood levels are different.
Jul 12, 2014
A member asked:

How long does weed stay in your saliva?

2 doctor answers5 doctors weighed in
Dr. Bruce Mulder
Dentistry 45 years experience
3 days: Thc can be detected in the saliva for approximately 3 days following smoking the product. It can be found in the urine for an even longer period after exposure.

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Last updated Sep 3, 2018
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