Medicinal Cannabis, Asthma and Intoxication

A study just published in the Journal of Drug Policy Analysis found that THC, the main active ingredient in cannabis – and not alcohol – is the most commonly detected substance causing intoxication in American drivers. In addition, no breath test has yet been developed to test how intoxicated marijuana users are; only a blood test in a medical facility can show this.

As for asthma, the National Center for Biotechnology Information of the US National Institutes of Health has published studies on the long-term health benefits of cannabis. In the short term, they may help a bit, but they can worsen asthma in the long term: “There is moderate evidence of a statistical association between cannabis smoking and improved airway dynamics with acute use, but not with chronic use.”

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