Comparative study of patients in correct usage of and preference for the Swinghaler and Turbuhaler multidose inhalers.

Objective: Current dry powder inhalers (DPIs), introduced to overcome problems associated with pressurized metered dose inhalers (pMDIs), possess not only difficulties originating from their designs but also other barriers that prevent their correct usage. The authors of this study investigated the ease and correctness of use of Swinghaler, a new device in the form of multidose DPI, as well as the preference of the study participants for either a Swinghaler or a Turbuhaler.

Methods: A total of 260 patients from Korea, China, Indonesia, the Philippines, Taiwan, and Thailand were prospectively recruited.