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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In Vitro Evaluation of the Performance of a Locally-acting Gastrointestinal Drug, Sucralfate
Al-Ghabeish, Manar; Manar; Feng, Xin; Mohammad, Adil; Lionberger, Robert; Robert; Faustino, Patrick; Ashraf, Muhammad
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In Vitro-In Vivo Relationships (IVIVR) For Transdermal Delivery Of Nicotine From Patches
Alinaghi, Azadeh; Cheruvu, Hanumanth; Liu, Xin; Anissimov, Yuri; Kuswahyuning, Rina; Ghosh, Priyanka; Grice, Jeffrey; Raney, Sam; Roberts, Michael
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Does Vehicle Evaporation Affect Drug Distribution within Different Phases of Topically Applied Emulsion? A Modeling Case Study with Clindamycin Phosphate Lotion
Alam, Khondoker; Tsakalozou, Eleftheria; Babiskin, Andrew; Ghosh, Priyanka; Ramezanli, Tannaz; Jiang, Ying; Niu, Mengmeng; Zhao, Liang
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Development of an In Vitro Release Method for Mechlorethamine Hydrochloride Topical Gel
Ako Adounvo, Ann Marie; Niu, Mengmeng; Ghosh, Priyanka; Ashraf, Muhammad; Zidan, Ahmed
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A Mechanistic Evaluation of How Metamorphosis of a Topical Dosage Form Impacts Permeation
Ajjarapu, S; Rangappa, S; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Urena-Benavides, EE; Maibach, H; Narasimha Murthy, S
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A Mechanistic Evaluation of the Impact of Formulation Viscosity and Fractional Solubility on Drug Release and Permeation
Ajjarapu, S; Rangappa, S; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Urena-Benavides, EE; Maibach, H; Narasimha Murthy, S
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The Impact of the Metamorphosis of Topical Formulations on Bioavailability
Ajjarapu, S; Rangappa, S; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Repka, M A; Maibach, H; Narasimha Murthy, S
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Method Development and Optimization of an In Vitro Permeation Test (IVPT) to Compare the Rate and Extent of Drug Permeation from Topical Drug Products
Ajjarapu, S; Rangappa, S; Raney, S G; Repka, M A; Murthy, S N
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A Novel Strategy for the Efficient Modulation of Topical Drug Delivery to Validate the Sensitivity of an In Vitro Permeation Test (IVPT)
Ajjarapu, S; Rangappa, S; Ghosh, P; Raney, S G; Murthy, S N
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Metronidazole Crystal Patterns formed during the Metamorphosis of Topical Carbopol Gels
Ajjarapu, S; Rangappa, S; Deboyace, K; Wildfong, P; Murthy, S N