Vaping cannabis can modestly impair driving up to 4 hours later

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Drivers who vape a combination of THC and CBD or THC alone show signs of “modest” impairment up to four hours later, a study published Tuesday by JAMA found. The impairment from vaping compounds containing the main ingredients of marijuana is equivalent to that seen in drivers with blood alcohol concentrations of 0.05%, or roughly half the legal limit for driving under the influence in most states, the researchers said. .en.

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