Marijuana Smoking or Vaping Linked to Higher Asthma Attack Risk in Young Adults: Study
USA: A study published in CHEST has revealed that inhaling marijuana through smoking or vaping is associated with a significantly increased risk of asthma attacks among U.S. adults aged 18–34 years. Researchers analyzed data from the Population Assessment of Tobacco and Health (PATH) study, a large longitudinal project by the FDA and NIH, to examine the health effects of tobacco-related behaviors. The findings highlight potential respiratory risks of marijuana inhalation in young adults.
Marijuana use has been steadily rising, particularly among younger populations, raising concerns about its potential health consequences. Asthma, a chronic inflammatory condition of the airways, can lead to recurrent episodes of wheezing, breathlessness, and acute exacerbations requiring medical treatment. Despite the growing prevalence of marijuana consumption, evidence examining its impact on asthma outcomes has remained limited.
To address this gap, Felicia Tanu and colleagues conducted an analysis using Waves 4 to 6 of the PATH study, a nationally representative dataset designed to evaluate tobacco use and related health outcomes in the United States. The study focused on adults with asthma and assessed whether marijuana inhalation at baseline was associated with asthma attacks over the following year.
The analysis included 4,477 participants, categorized based on their marijuana use patterns. Individuals were grouped as non-users, those who smoked combustible marijuana, those who used electronic or vaping devices, and those who engaged in both forms. Asthma attacks were identified based on self-reported use of oral or injectable corticosteroids for symptom control within the previous 12 months. The researchers applied weighted multivariable logistic regression models to account for demographic and clinical factors.
The researchers reported the following findings:
- Marijuana inhalation was associated with an increased likelihood of asthma exacerbations.
- Individuals who smoked marijuana had a 64% higher risk of experiencing an asthma attack compared to non-users.
- Individuals who used vaping devices had an 81% higher risk of asthma attacks.
- Dual users who both smoked and vaped marijuana had a 57% higher risk of asthma attacks.
These findings suggest that inhalation, regardless of the method, may contribute to airway irritation or inflammation, potentially triggering asthma symptoms. The consistent association across different modes of marijuana use highlights the need for caution, particularly among individuals already diagnosed with asthma.
The authors emphasized that as marijuana becomes more widely accepted and accessible, understanding its health implications is increasingly important. While the study establishes an association rather than causation, it provides important real-world evidence linking marijuana inhalation with adverse respiratory outcomes.
Overall, the study highlights a potential public health concern, especially for young adults with asthma who may perceive marijuana as relatively harmless. The researchers call for further investigations to better understand the long-term respiratory effects of marijuana use and to guide clinical recommendations for patients with asthma.
Reference:
Tanu, F., Mortensen, E. M., Sacco, S. J., Demirci, D., & Perez, M. F. (2026). Association of Inhaling Marijuana with Asthma Attacks: An Analysis of Nationally Representative Survey Data. CHEST. https://doi.org/10.1016/j.chest.2026.03.004
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