Delivery and the importance of the inhalation device in asthma therapy

Inhaled medications are the mainstay of asthma treatment. This route of administration provides the largest clinical effect with few systemic side-effects. The two main types of delivery systems are pressurized metered-dose inhalers (pMDIs) and dry powder inhalers (DPIs). An ideal inhalation device should be easy to use, provide optimal lung deposition, give minimal oropharyngeal/gastrointestinal deposition, and contain no harmful additives. …