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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Effect of Adhesion on Pharmacokinetics (PK) of Transdermal (TDS) Topical Products
Sun, Wanjie; Zhang, Zhen; Zhou, Lingjie; Grosser, Stella; Li, Bing; Yim, Sarah; Raney, Sam; Ghosh, Priyanka; Kim, Carol; Wang, Rong
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Statistical Considerations in OGD’s New Draft Guidance for Assessing Adhesion with Transdermal Delivery Systems and Topical Patches for ANDAs
Sun, Wanjie; Grosser, Stella; Kim, Carol; Raney, Sam
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A Comparison of the European Medicines Agency (EMA) and United States Food and Drug Administration Approaches to Assessing/Comparing In Vivo Adhesion for Transdermal Delivery Systems (TDS)
Sun, Wanjie; Grosser, Stella; Kim, Carol; Raney, Sam
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Is Water Activity The Primary Determinant Of Metamorphosis For Topical Creams?
Srinatha, A; Ghosh, P; Raney, S G; Maibach, H I; Murthy, S N
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Clinical Relevance Of Rheological Characteristics Of Topical Creams: Relationship Between Yield Stress And Dose Spreading Area
Srinatha, A; Hashemnejad, S M; Kundu, S; Ghosh, P; Raney, S G; Murthy, S N
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Influence Of The Method Of Dose Application On The In Vitro Permeation Profile Of Acyclovir From Topical Creams
Srinatha, A; Maurya, A; Ghosh, P; Raney, S G; Murthy, S N
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Steps Towards Microscopic Simulations Of Skin Penetration
Sontak, E; Holmes, A; Pastore, M; Studier, H; Abd, E; Grice, J; Roberts, M; Brandner, J; Heisig, M; Nagel, A; Wittum, G
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Impact of Particle Flocculation on Dissolution and Implications on Bioavailability of Injectable Suspensions
Smith, William; Bae, Jungeun; Zhang, Ying; Wang, Yan; Qin, Bin; Kozak, Darby; Ashraf, Muhammad; Xu, Xiaoming
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Interplay Between Particle Flocculation and Dissolution Leading to Variation in Bioavailability and Clinical Performance of Injectable Suspensions
Smith, William; Bae, Jungeun; Zhang, Ying; Wang, Yan; Qin, Bin; Kozak, Darby; Xu, Xiaoming
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Influence of polymeric excipients on the precision of particle size distribution measurements of suspensions using laser diffraction
Smith, William; Vo, Anh; Bae, Jungeun; Wang, Yan; Qin, Bin; Xu, Xiaoming