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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Coating Stages of Next Generation Impactor (NGI) When Testing Metered Dose Inhalers (MDIs) ��� A Comparative Study on US Commercial MDI Products
Sandell, Dennis; Svensson, Marten; Conti, Denise; Sheth, Poonam; Oguntimein, Oluwamurewa; Bielski, Elizabeth; Bulitta, Jurgen; Hochhaus, Gunther
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Comparative Evaluation of the Permeation of Metronidazole Using Static Diffusion Cells and Flow-Through Diffusion Cells
Rangappa, S; Ajjarapu, S; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Repka, M; Maibach, H; Narasimha Murthy, S
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Influence of Varying Amount of an Inactive Ingredient on the Microstructure and Performance of Metronidazole Topical Gels
Rangappa, Srinath; Ghosh, Priyanka; Jiang, Ying; Raney, Sam G; Murthy, S Narasimha
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Critical Quality Attributes of Topical Pharmaceutical Foams
Rangappa, Srinath; Ajjarapu, Srinivas; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Repka, Michael; Maibach, Howard; Murthy, Narasimha
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Critical Quality Attributes of Topical Clobetasol Propionate Foams
Rangappa, S; Ajjarapu, S; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Repka, M; Maibach, H; Narasimha Murthy, S
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Influence of Relative Humidity on Time to Break Analysis of Pharmaceutical Foams
Rangappa, Srinath; Ajjarapu, Srinivas; Ghosh, Priyanka; Kelchen, Megan; Raney, Sam; Repka, Michael; Maibach, Howard; Murthy, Narasimha
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Evaluation of Bioavailability of Lidocaine and Prilocaine from Topical Drug Products Using an In Vitro Permeation Test (IVPT)
Rangappa, Srinath; Ajjarapu, Srinivas; Ghosh, Priyanka; Rantou, Elena; Raney, Sam; Repka, Michael; Murthy, Narasimha
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Comparative Assessment of the Physical and Structural Similarity of Topical Drug Products Containing Lidocaine and Prilocaine
Rangappa, Srinath; Ajjarapu, Srinivas; Varadarajan, Anandavalli; Prado, Rosa-Maria-Badani; Ghosh, Priyanka; Raney, Sam; Kundu, Santanu; Repka, Michael; Murthy, Narasimha
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Evaluation of Different Dose Application Techniques on the In Vitro Cutaneous Pharmacokinetics of Metronidazole from Topical Gel and Cream Products
Rangappa, Srinath; Ajjarapu, Srinivas; Ghosh, Priyanka; Raney, Sam; Murthy, Narasimha
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Correlation between the Quality Attributes and Performance Characteristics of Metronidazole Gels and Creams: Implications for the Evaluation of Bioequivalence
Rangappa, Srinath; Ajjarapu, Srinivas; Hashemnejad, Seyed-Meysam; Prado, Rosa-Maria-Badani; Ghosh, Priyanka; Raney, Sam; Kundu, Santanu; Murthy, Narasimha