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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SRS Microscopy and Deep Learning: Novel Approach for Evaluation of Topical Bioequivalence
Iliopoulos, Fotis
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Equivalence Criteria for In Vitro BE Tests for Locally Acting Drug Products: The Earth Mover’s Distance Approach
Hu, Meng
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Development of an In Vitro Method for In Vivo Prediction of Regional Deposition of Nasal Powders
Holtgrewe, Nicholas; Walenga, Ross; Bielski, Elizabeth; Guo, Changning
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Alternative Bioequivalence Approach Using Morphologically-Directed Raman Spectroscopy (MDRS) on Nasal Spray Suspensions
Holtgrewe, N
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From Q2 To Qbd: The Influence Of Formulation Changes On Mdi Performance
Holt, Jay; Hickey, Anthony; Sandell, Dennis
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Materials for Aerosol Treatment of Disease: New Microscopy for Bioequivalence and Improving Therapeutic Index
Holl, Mark Banaszak
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Evaluating Particle Size Differences of Suspension-based Nasal Sprays Through In Vitro and Pharmacokinetic Approaches
Hochhaus, G; Amini, E; Berger, S; Shur, J; Kurumaddali, A; Schilling, U; Jiao, Y; Drescher, S; Seay, B; Baumstein, S; Abu Hasan, M; Oguntimein, O; Carrasco, C; Winner, L; Delvadia, R; Saluja, B; Price, R; Conti, D; Dhapare, S; Newman, B; Bulitta, J
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Dissolution Methodologies
Hochhaus, Gunther
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Pharmacokinetic Comparison of Locally Acting Nasal Suspension Spray Products
Hochhaus, Gunther; Bulitta, Jurgen
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Unraveling the Pulmonary Fate of Fluticasone and Friends: Meeting the Physiologic and Pharmacokinetic Challenge
Hochhaus, Guenther