Instead, researchers have been testing on THC-spiked saliva. That suggests that results of the test may b less successful when used on human subjects in a real-world scenario.

Marijuana, derived from the cannabis plant, contains the psychoactive compound delta-9-tetrahydrocannabinol (THC), which can be detected in various bodily fluids, including saliva.

Now, scientists report a convenient saliva test for cannabis levels that might someday be used at roadside stops. The researchers will present their results today at the American Chemical Society ...

Saliva test for cannabis could someday help identify impaired drivers. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2020 / 03 / 200330152114.htm ...

COLUMBUS, Ohio (WCMH) — The Ohio State Highway Patrol launched a pilot program in August to crack down on impaired driving but has recently started implementing a new test. The agency is looking ...

Typically, THC is detectable for up to 72 hours after use in saliva tests. In areas where cannabis remains prohibited, oral fluid is likely the method for roadside testing. Hair tests ...

The Ohio State Highway Patrol launched a pilot program for an oral marijuana test to help get impaired drivers off the road. [DOWNLOAD: Free WHIO-TV News app for alerts as news breaks] As reported ...

There are some existing saliva tests for THC, but they are hampered by issues like slow processing time or giving "binary" results -- similar to a yes/no on a pregnancy test.

"With oral THC, it takes several hours for [blood THC] to peak, but it remains very low compared to the smoked route, even though they're very high. It's a hundredfold difference," she says. But ...

That solution is oral fluid testing, which uses saliva to test for the presence THC and other drugs. Police ask the driver to swab his or her mouth and place the sample into a device, which can ...

COLUMBUS, Ohio (WCMH) — The Ohio State Highway Patrol launched a pilot program in August to crack down on impaired driving but has recently started implementing a new test. The agency is looking ...