Publication

Keep your powder dry -  moisture in dry powder inhalers

This article discusses the importance of moisture in determining the performance of a dry powder inhaler (DPI) system; the concept of a moisture budget for a DPI; the sources of moisture; how these can be understood; and the protection of a DPI from the harmful effects of moisture. It outlines an approach to investigation of product and packaging integrity and how assessment of container integrity could be used to quickly determine potential product stability.