A new study out of Australia has found that tetrahydrocannabinol (THC) levels recorded in blood and saliva tests are inconsistent indicators of impairment.
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Published in the journal Neuroscience & Biobehavioral Reviews , the study concluded that the use of per se limits as a means of identifying cannabis-impaired drivers should be reconsidered.
“It seems there is a significant risk of unimpaired individuals being mistakenly identified as ‘cannabis-impaired’ (and vice-versa) under this approach,” researchers wrote.
Dr. Danielle McCartney, from the University of Sydney’s Lambert Initiative for Cannabinoid Therapeutics, analyzed all available studies on the relationship between driving performance and THC concentrations in blood and saliva
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