In February 2019 researchers from Norway published the results of their study to assess the association of cannabis use on risk of bronchial asthma. A total of 2602 young adults were followed for 13 years. Information on asthma medication was collected from the Norwegian national prescription database and current cannabis use, gender, age, years of education, BMI and current smoking collected. Results showed that cannabis use may be a risk factor for bronchial asthma or use of asthma medication. Intake of cannabis through smoking should therefore be avoided in individuals at risk.
Bramness JG, von Soest T. A longitudinal study of cannabis use increasing the use of asthma medication in young Norwegian adults. BMC Pulm Med. 2019 Feb 26;19(1):52