Cannabinoids in oral fluid following passive exposure to marijuana smoke

The concentration of tetrahydrocannabinol (THC) and its main metabolite 11-nor-D9-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) as well as cannabinol (CBN), and cannabidiol (CBD) were measured in oral fluid following realistic exposure to marijuana in a Dutch coffee-shop.

THC-COOH was not detected in any specimens from passively exposed individuals. Therefore it is recommended that in order to avoid false positive oral fluid results assigned to marijuana use, by analyzing for only THC, the metabolite THC-COOH should also be monitored.

From Forensic Science International, by Christine Moore, Cynthia Coulter, Donald Uges, James Tuyay, Susanne van der Line, Arthur van Leeuwen, Margaux Garnier, Jonathan Orbita Jr.

Download article: Passive exposure to marijuana FSI 2011 (PDF).


Call today on 1800 429 219 for your customised, on-site drug testing solution.

Have a Question?

Complete the online form below and we will be in touch to discuss your individual requirements.

  • This field is for validation purposes and should be left unchanged.