This new oral formulation has been mainly developed for patients who have difficulties or dislike swallowing tablets, this being of particular importance considering the debilitated patient population experiencing serious fungal infections.
A dry powder formulation to be reconstituted has been chosen over a “ready-to-use” liquid
formulation based on the active substance properties: low solubility and instability in aqueous environments, and good stability in the solid state.
It has been demonstrated that the particle size of the active substance has no influence on
manufacturing process, suspension properties and stability of the finished product. However, an apparent relationship between this parameter and in vitro dissolution was observed, but batches with a wide range of particle size distribution have been shown to be clinically acceptable. Based on these data, an appropriate particle size specification for voriconazole drug substance has been established (see active substance).