Researchers say they’ve pinpointed how long THC is impairing, with smoking having shorter times than ingestion

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Investigators with the University of Sydney’s Lambert Initiative for Cannabinoid Therapeutics believe they have taken hold of a slippery proposition around THC: Does detection equate to impairment? Determining the precise amount of time someone is impaired after inhaling or orally ingesting weed does not come down to a specific number — given that response is individual — but researchers believe it may come down to a range. Calling the review the first meta-analysis of 80 scientific studies on THC-induced impairment over 20 years, investigators identified a “window of impairment” from three to 10 hours as a result of “moderate to high doses” of THC, states the review published online today in Neuroscience & Biobehavioral Reviews . Study finds that using CBD alone has no negative impact on driving ability Here’s everything you need to know about roadside testing for THC Professor develops app that measures the effects of cannabis on a user’s neurocognitive functions Study participants received a moderate THC dose of about 10 milligrams, although investigators make clear “what is moderate for a regular user could be high for an occasional user,” notes a statement on the review , which was funded by the initiative. Investigators looked at the acute effects of THC on driving performance and driving-related cognitive skills, with a particular focus on the duration of THC-induced impairment, the study abstract reports . “Our analysis indicates that impairment may last up to 10 hours if high doses of THC are consumed orally,” study lead author Danielle McCartney of the Lambert Initiative notes in the statement. Medicinal cannabis users who consumed THC in oils, sprays or capsules, for example, showed that “impairment takes longer to appear and lasts significantly longer than with inhaling,” the statement reports. Although a more typical impairment duration is four hours — say when…

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Source : Researchers say they’ve pinpointed how long THC is impairing, with smoking having shorter times than ingestion

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