According to a study published in the journal Chronic Obstructive Pulmonary Diseases, exposure to cannabis smoke, even for long periods of time, is not associated with adverse effects on lung health. The researchers from the Colorado School of Public Health looked at marijuana use and its correlation to respiratory function and symptoms in 2,300 subjects between the ages of 40 and 80. Many users were also tobacco users. They found current and former marijuana users were not at an increased risk of developing a cough, wheezing, or chronic bronchitis, in comparison with those who had never used marijuana after adjustments to covariates were made. Although current and former marijuana users had higher FEV1 (forced expiratory volume) when compared to never users, they were associated with significantly less quantitative emphysema than never users. They added, “In agreement with other published studies, we also did not find that marijuana use was associated with more obstructive lung disease.” Authors also determined marijuana use did not increase adverse effects on the lungs among tobacco users.
This information has been provided by NORML and approved by our Chief Medical Officer.