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Smoke is harmful to lung health. Whether it’s from tobacco or cannabis, toxins and carcinogens are released from the burning of those substances. Smoke from cannabis has been shown to contain many of the same toxins, irritants and carcinogens as tobacco smoke.
More research is needed to understand the impacts of smoking cannabis on the lung health of users and those around them. Some studies show that heavy smoking of cannabis may lead to chronic bronchitis and a worsening of chronic lung disease symptoms. It may also lead to symptoms including cough, sputum, wheezing, and a decline in lung function.
The impact of lung health is of particular concern for those who also smoke tobacco. The devastating impacts of tobacco smoke are well known and individuals who co-use may be at an increased risk.
If using cannabis, try to avoid smoking it, if possible.
Second-hand cannabis smoke contains many of the same toxins and carcinogens found in directly inhaled cannabis smoke. While there is no data on the health risks associated with breathing second-hand cannabis smoke, there is concern that it could cause harmful effects, especially among vulnerable populations like children.
More long-term research is needed to fully understand the effects of cannabis smoke, including second-hand cannabis smoke, on lung health.