Multiphase versus single pot granulation process: influence of process and granulation parameters on granules properties.

High-shear wet granulation is widely used for the production of pharmaceutical dosage forms. Different equipment is available for high-shear granulation and drying. This review focuses on two main processes for granules production: multiphase consisting of high-shear granulation followed by drying in a separate apparatus, and single pot granulation/drying. At present, formulas are specifically developed with regard to the production equipment, which raises many problems when different industrial manufacturing equipment is used. Indeed, final granules properties are likely to depend on equipment design, process, and formulation parameters. Therefore, a good understanding of these parameters is essential to facilitate equipment changes. The aim of this review is to present the influence of equipment, process, and formulation parameters on granules properties, considering both the granulation and the drying steps of multiphase and single pot processes.