The most common type of powder-based formulations for inhalation consists of one or several active compounds (API) and an inactive carrier molecule like lactose.

The APIs must be grinded to a particle size smaller than 5 µm with high precision and low variability to be able to reach the lung.

The formulation must be optimized with regards to composition e.g., quality and amount of carrier molecules, and as well as processing parameters to obtain the right characteristics like flowability and dispersibility.

Significant pharmaceutical knowledge and experience is required to obtain a formulation that meets all the requirements.