Inhaled Marijuana Linked to Increased Risk of Asthma Attacks: Study

A recent study demonstrates that inhaled marijuana is associated with increased risk of asthma exacerbations in patients with underlying asthma, a finding with direct relevance to clinicians counseling patients about cannabis use. The mechanism likely involves airway irritation and inflammatory responses triggered by cannabis smoke inhalation, similar to tobacco smoke exposure. Clinicians should recognize that patients with asthma who use inhaled cannabis may experience worsening respiratory symptoms, increased emergency department visits, and potential loss of asthma control. This evidence is particularly important when taking cannabis use histories and educating patients about safer consumption methods, as alternative routes such as oral or topical administration may pose lower respiratory risk. The findings suggest clinicians should explicitly counsel asthmatic patients against smoking or vaping cannabis and consider documented asthma as a relative contraindication to inhaled cannabis products. Patients with asthma considering cannabis for therapeutic purposes should be directed toward non-inhaled formulations and should maintain close monitoring of their respiratory status if they choose to use cannabis.

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