The previous discussion highlighted the fundamental principles of biopharmaceu-tics and illustrated examples of their applicability in the drug development process. The current level of scientific understanding of the field is substantial but continues to expand. The nature of the drug molecules and types of issues encountered during development are diverse, so there is no standard approach that can be applied to every compound. However, as the state of knowledge increases, the biopharma-ceutical scientist becomes better able to apply the right tools to any compound. A good scientific understanding of physical-chemical principles, PK, and physiology as well as the integration of these areas is a key to the efficient development of quality products for the benefit of patients.
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