Cannabis vapour has no impact on breathlessness in COPD

A single dose of vapourised cannabis has no clinically meaningful effect on airway function, exertional breathlessness and exercise endurance in people with advanced COPD, Canadian researchers report. The single-centre, randomised, cross-over study published in the Annals of the American Thoracic Society involved 16 patients who inhaled vaporised cannabis (extracted from 35 mg of 18.2%-THC dried ...

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