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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A New Paradigm for Topical Generic Drug Products: Impact on Therapeutic Access
Luke, Markham
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Towards clinically relevant in vitro testing of locally acting nasal spray suspension products
Azimi, Mandana; Longest, Worth; Hindle, Michael
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Evaluation of the Fast Screening Impactor with Dry Powder Inhalers
Holtgrewe, Nicholas; Reed, Nathan; Kaviratna, Anubnav; Rodriguez, Jason; Guo, Changning
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Cyclosporine Release and Distribution in Ophthalmic Emulsions Determined by Pulsatile Microdialysis
Bellantone, Robert; Shah, Kosha; Patel, Piyush; Kaplan, Marissa; Xu, Xiaoming; Li, Vincent; Newman, Bryan; Kaisar, Md Abul
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Adaptive Perfusion: An In Vitro Release Test (IVRT) for Complex Drug Products
Patel, Deval; Zhang, Ying; Dong, Yixuan; Qu, Haiou; Kozak, Darby; Ashraf, Muhammad; Xu, Xiaoming
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A Stability Analysis of a Modified Version of the Chi-Square Ratio Statistic: Implications for Equivalence Testing of Aerodynamic Particle Size Distribution
Weber, Benjamin; Hochhaus, Guenther; Adams, Wallace; Lionberger, Robert; Li, Bing; Tsong, Yi; Lee, Sau
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Predictive In Vitro Dissolution Methods for Orally Inhaled Drug Products
Price, Robert
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Evaluation of Bio-Relevant Mouth-Throat Models for Characterization of Metered Dose Inhalers
Kaviratna, Anubhav; Tian, Geng; Liu, Xiaofei; Delvadia, Renishkumar; Lee, Sau; Guo, Changning
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Biopharmaceutics of Topical Ophthalmic Suspensions: Importance of Viscosity and Particle Size in Ocular Absorption of Indomethacin
Toropainen, Elisa; Fraser-Miller, Sara; Novakovic, Dunja; Del Amo, Eva; Vellonen, Kati-Sisko; Ruponen, Marika; Viitala, Tapani; Korhonen, Ossi; Auriola, Seppo; Hellinen, Laura; Reinisalo, Mika; Tengvall, Unni; Choi, Stephanie; Absar, Mohammad; Strachan, Clare; Urtti, Arto
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Effect of Device Design and Formulation on the In Vitro Comparability for Multi-Unit Dose Dry Bowder Inhalers
Shur, Jagdeep; Saluja, Bhawana; Lee, Sau; Tibbatts, James; Price, Robert