DissoﬂuxTM is a patented technology that enables the investigation of both dissolution and permeability of the drug in the ﬁnished dosage form. It has potential to serve as a critical R & D tool, which aids formulation development by rank ordering formulations and formulation selection for bio studies. The impact of various excipients can be investigated on solubility as well as permeability of the drug. In vitro and in vivo correlations can be drawn based on ﬂux values. Dissoﬂux ™ has a robust design and can operate with any Electrolab’s bath and bathless dissolution tester.