APIs and Excipients

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Biologics are large molecular weight molecules primarily formulated for parenteral administration; however, there are some smaller biomolecules that have been formulated for oral use.

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Excipient purity is critical in all applications of drug formulation. Typically, the more sensitive or reactive an API, the more critical excipient purity becomes.

Stuart Needleman, president of active-ingredient development and manufacturing at Aptuit, discusses industry trends and challenges.

The author describes the development of small-angle X-ray scattering and analyzes its advantages in the characterization of drug-delivery systems and large molecules. This article is part of a special Analytical Technology issue.