An examination of differences between gelatin and HPMC capsules and their respective contributions to DPI formulations.
With the growing number of dry powder inhalers, it has been well recognized that a unique set of requirements related to these formulations exist separately from traditional, solid-dose, oral formulations. These requirements have implications for devices, containers and manufacturing equipment, such that a successful product will ultimately be the partnership of these. This article will discuss the unique qualities associated with a dry powder inhaler formulation and ways to streamline DPI formulation efforts by the choice of capsule.