Á sama hátt leiðir dómgreindarleisið og áhyggjuleisið sem fylgir notkun cannabisefna verage speed was the most sensitive driving performance variable affected by both THC and alcohol but with an opposite effect,“ authors wrote. ”Smoking THC cigarettes caused drivers to drive slower in a dose-dependent manner, while alcohol caused drivers to drive significantly faster than in ‘control’ conditions." Það er enginn að fara segja mér að fólk sé líklegara til að prufa önnur efni undir áhrifum cannabisefna.