According to Yawn (2011) [[#_edn1|[i]]] there are two types of portable delivery devices for bronchodilators on the market - measured or metered inhalers, which are generally aerosol, and breath activated inhalers that contain a medication in powdered form.



[[#_ednref1|[i]]] Yawn, B.P. (2011) Optimizing chronic obstructive pulmonary disease management in primary care. Southern Medical Journal 104, 2, 121-127.