Bronchitis is an infection of the main airways of the lungs (bronchi), causing them to become irritated and inflamed. Bronchitis is a chronic obstructive pulmonary disease (COPD) and is often grouped alongside asthma and emphysema. There have been approximately 448 deaths due to bronchitis as of 2014.
There is some evidence that smoking cannabis may cause chronic bronchitis, as smoke can damage the cell linings of airways leading to the lungs. This can lead to chronic cough, phlegm production, and wheezing. However, these dangers can be mitigated by avoiding smoking cannabis and using a well-made vaporizer or inhaler. THC, CBD, pinene, and eucalyptol may prove useful for opening up the airways and easing breathing (vasodilatory).
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