Key Points

• Cannabis smoke contains many of the same chemicals as tobacco smoke, several of which are known carcinogens.
• Evidence for a link between cannabis smoking and stroke, heart attack and inflammation of the arteries is limited and still unclear. Further studies are required to clarify whether heavy cannabis smoking is a risk factor for the onset of these complications.
• Cannabis smoking has been related to a greater incidence of coughing, wheezing, sore throat, chest tightness and hoarse voice.
• Evidence for a link between cannabis smoking and serious lung conditions such as cancer or chronic obstructive pulmonary disease is unclear. Further research is needed to clarify whether cannabis smoke is a factor for lung cancer.
• There is emerging evidence that quitting cannabis smoking can reverse some of the negative respiratory symptoms associated with its use.
• Further research is needed to investigate the short- and long-term effects of vaping cannabis on both cardiovascular and respiratory systems.
• It is essential for healthcare professionals to be aware of the impact of cannabis smoking on respiratory and cardiovascular health so that they can inform and advise their patients, as well as develop strategies to promote awareness and general cardiovascular and respiratory health.