The development of generic dry powder inhaler products represents a significant challenge to product developers due to the complex interactions which occur between the formulation, device and patient during drug delivery. Regulatory guidance suggests that any generic device must work in a similar way to the innovator product and also deliver the dose in order to achieve a similar bioavailability. Achieving this requires an in-depth understanding of the behaviour of the dose when it is dispersed using the energy available from a patient's inhalation effort. It is also important to understand how the different components within the formulation interact during storage and device actuation, particularly in the case of combination products. In this webinar, we introduce how laser diffraction and Morphologically Directed Raman Spectroscopy (MDRS) can be applied to gain this understanding.