Caffeine In Asthma

Caffeine is similar to theophylline, which can be used to treat asthma through bronchodilation from smooth muscle relaxation and a reduction in airway responsiveness.

A Cochrane review found that caffeine improves lung function in people with asthma, up to 4 hours.


  1. Welsh EJ, Bara A, Barley E, Cates CJ. Caffeine for asthma. Cochrane Database of Systematic Reviews 2010, Issue 1. Art. No.: CD001112. DOI: 10.1002/14651858.CD001112.pub2
  2. DrugBank. (2005). Theophylline. [online] Available at: [Accessed 5 Apr. 2018].

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