Aerosolized administration of biopharmaceuticals to the airways is a promising route for nasal and pulmonary drug delivery, but − in contrast to small molecules − little is known about the effects of aerosolization on safety and efficacy of biopharmaceuticals. Proteins are sensitive against aerosolization-associated shear stress. Tailored formulations can shield proteins and enhance permeation, but formulation development requires extensive screening approaches. Thus, the aim of this study...