Tag: driving

Study: Elevated THC Blood Levels Persist for Days in Habitual Cannabis Consumers

By Paul Armentano, NORML VICTORIA, AUSTRALIA — The presence of THC may persist in the blood of habitual cannabis consumers for multiple days at concentrations above 5ng/ml, according clinical data recently published in the journal Forensic Science International. Australian researchers assessed daily concentrations of THC in the blood of 21 subjects over a period of 7 days …

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Zero Tolerance Driving Policy for Cannabis Struck Down by Arizona Supreme Court

By Associated Press Authorities can’t prosecute Arizona motorists for driving under the influence of marijuana unless the person is impaired at the time of the stop, the state Supreme Court ruled Tuesday in the latest opinion on an issue that several states have grappled with across the nation. The ruling overturned a state Court of …

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Study: Cannabis Least Likely Substance To Elevate Vehicle Crash Risk

By Paul Armentano, Deputy Director, NORML The presence of various controlled substances in blood is associated with an increased risk of fatal crash involvement, according to data published online in the journal Accident Analysis and Prevention. Investigators at Columbia University conducted a case-control study to assess the association between drug use and fatal crash risk. Of the substances …

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