Study casts doubt on zero-tolerance for THC

A new study carried out by researchers at the Toronto-based Centre for Addiction and Mental Health demonstrated that participants showed no detectable signs of impairment on the day after they smoked cannabis, although they still tested positive for its main psychoactive component, tetrahydrocannabinol (THC). According to Scott Macdonald, a retired professor at the University of Victoria, these results suggest implications for workplace regulations and laws which require zero traces of THC in employees’ drug test results.

“I consider it one of the biggest myths about cannabis, that there are 24-hour hangover effects that are measurable… When people smoke cannabis, they’re only impaired for a short, short period of time. You could have THC in your bloodstream, but you’re not a danger,” McDonald said in his interview with Global News. Furthermore, he referred to such laws as “not scientific.”

By DATAC
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