Purpose Lubrication is critical in pharmaceutical manufacturing of solid dosage forms. The purpose of this paper is to systematically compare and correlate the lubrication effect of two devices, a controlled shear system and a Resonant Acoustic Mixer, on the flow properties of pharmaceutical blends. Method A model formulation was selected. Full factorial designs were conducted to examine the effect of the total strain (or total energy) and the shear rate (or power) on the powder blend flow...