GDUFA Research Outcomes
Complex Routes of Delivery
The Generic Drug User Fee Amendments (GDUFA) science and research program facilitates patient access to high-quality generic drugs by advancing research in areas where generic product development has been limited or prevented due to knowledge gaps about the kind of evidence needed to demonstrate that a generic product is the same as its brand name reference listed drug product. Leaders and experts across the generic industry collaborate to establish GDUFA research priorities for the most pressing scientific challenges they face with generic product development. Scientists and clinicians from industry, academia, and the U.S. Food and Drug Administration (FDA) strategically design research in these areas so that the outcomes help to build scientific bridges across the knowledge gaps, thereby facilitating pharmaceutical manufacturers to develop generic drugs that were previously challenging or unfeasible to develop.
A major GDUFA science and research priority is to enhance the efficiency of bioequivalence (BE) approaches for complex routes of delivery, such as locally-acting gastrointestinal (GI), buccal, sublingual, inhalation, nasal, ophthalmic, otic, and topical dermatological, vaginal and rectal products. The advancement of research in this area focuses on understanding of how ingredients and other aspects of a formulation influence drug absorption via complex routes of delivery, building in vivo predictive models and identifying corresponding failure modes for BE, to support the development of efficient BE approaches for these products.
Outcomes including scientific publications, presentations, and posters arising from GDUFA-funded research in this priority area are available in this section.
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Orally Inhaled Drug Product PSGs: Considerations for Using Modeling and Simulation with Alternative BE Approaches
Walenga, Ross
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Sensitivity of Charcoal Block PK Metrics to Differences in Regional Deposition for Budesonide and Formoterol Fumarate Dihydrate
Walenga, Ross; Tsakalozou, Eleftheria; Chopski, Steven; Fang, Lanyan (Lucy); Liang, Zhao
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Regulatory Perspective on MMF Applications for OIDPs, Ophthalmic Drug Products, and Drug Products Applied on the Skin
Walenga, Ross
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Complex Nasal Suspensions: Utilization of In Silico Studies to Support Development and Approval
Walenga, Ross
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Utilizing In Vitro and In Silico Methods to Accelerate Product Development for Generic Nasal Drug Products
Walenga, Ross
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Mechanistic Modeling and Realistic In Vitro Models to Facilitate Development of Generic Nasal Drug Products
Walenga, Ross
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Modeling of CNS Delivery for Nose-to-Brain Targeted Drug Products
Walenga, Ross
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Abbreviated New Drug Application (ANDA) and Pre-ANDA Experience with Orally Inhaled Drug Product (OIDP) Modeling
Walenga, Ross
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In Silico and Experimental Methods to Support Generic Nasal Drug Product (NDP) Development
Walenga, Ross
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Credibility Establishment for Computational Fluid Dynamics Models of Complex Generic Drug Delivery
Walenga, Ross