Newswise — A comprehensive analysis of 80 scientific studies has identified a ‘window of impairment’ of between three and 10 hours caused by moderate to high doses of the intoxicating component of cannabis, tetrahydrocannabinol .
“Our analysis indicates that impairment may last up to 10 hours if high doses of THC are consumed orally.
Academic Director of the Lambert Initiative, Professor Iain McGregor, said: “THC can be detected in the body weeks after cannabis consumption while it is clear that impairment lasts for a much shorter period of time.
“Laws should be about safety on the roads, not arbitrary punishment.