Cannabinoids and Asthma
Asthma is a chronic inflammatory disease of the respiratory system caused by the sum of inflammation, hyperresponsiveness ( increase bronchoconstrictor activity ) and intermittent obstruction of the airways. Its clinical expression is variable, but mainly consists of shortness of breath, coughing, chest tightness and wheezing. Asthma attacks all age ranges, but generally it begins in infancy. There is no cure, but there are various treatments that aim to address the symptoms to improve the quality of life. When asthma attacks occur, the muscles surrounding the airways become tight, thus narrowing the airway . If this situation is left unchecked, the symptoms may worsen and generate an extreme narrowing, since at the cellular level cells begin to produce more mucus, which decreases the chances of air entering the lungs.
Cannabinoids can have a positive effect on people with asthma. Also the anti-inflammatory and analgesic benefits, causes a decrease in the inflammatory process.
Cannabinoids for treating asthma
Studies have shown that smoking marijuana produces bronchodilation in both healthy individuals as well as asthmatics. According to a study in “British Journal of Pharmacology ” ( 2014 ) …concluded that : ” The activation of CB1 synaptic pre receptors inhibit cholinergic contraction in human bronchi and the inhibitory effects of cannabinoids on cholinergic contraction may explain the acute bronchodilation experienced by individuals who smoke marijuana”. 
This action is strengthened by the more commonly known, traditional consumption of cannabis which is rich in CBD and contains anti-inflammatory and analgesic effects. Thus, its medicinal use to treat inflammatory disorders, such as asthma is widely accepted by the scientific community. 
Bibliography for Asthma and Cannabinoids
 S Grassin-Delyle, E Naline, A Buenestado, C Faisy, J-C Alvarez, H Salvator, C Abrial, C Advenier, L Zemoura, and P Devillier. 2014 Cannabinoids inhibit cholinergic contraction in human airways through prejunctional CB1 receptors. Br J Pharmacol. Jun; 171(11): 2767–2777.
 E.A. Formukong, A.T. Evans, and F.J. Evans. ANALGESIC AND ANTIINFLAMMATORY ACTIVITY OF CONSTITUENTS OF CANNABIS SATIVA L INFLAMMATION, Vol 12, No. 4, 1988