These changes in performance were less pronounced in subjects who were either regular consumers of cannabis or who were using it to treat a chronic medical condition.
Topic: Driving
Investigators determined that performance following the ingestion of both alcohol and cannabis together “was significantly greater than the effect of each drug by itself.”
The study’s authors concluded, “There was no apparent increase in the incidence of driving under the influence of marijuana after legalization.”
“The blood and oral fluid per se limits examined often failed to discriminate between impaired and unimpaired drivers,” investigators concluded.
"It was found that therapeutic cannabis reduced overall mean speed with no effects on … lateral control or brake latency."
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