ABSTRACT
Several inhaler devices are currently available on the market, and these are classified as pressurized metered-dose inhaler (pMDIs), breath-actuated (BA) pMDIs, dry powder inhalers (DPIs), soft mist inhalers (SMI), and nebulized or “wet” aerosols. In this chapter, the authors focus on the handheld inhalers, together with the current understanding of the correct inhalation techniques for each device. They also provide a general description of nebulizers, which are frequently used to deliver asthma medications. The authors assess the problems that can lead to poor inhaler technique, which could contribute to poor asthma control. Finally, they summarize some of the recommendations by the Aerosol Drug Management Improvement Team (ADMIT) for inhaler selection, as well as an algorithm for asthma therapy adjustment. pMDIs are the most widely prescribed inhalers for the treatment of asthma and chronic obstructive pulmonary disease. DPIs were first introduced in 1970, the earliest being singledose devices containing the powder formulation in a gelatine capsule.
