GDUFA Research Outcomes
Quantitative Methods & Models
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 facilitate the utility of model-integrated evidence (MIE) to support demonstrations of bioequivalence (BE). The advancement of research in this area focuses on developing tools and advancing approaches to integrate complementary in silico (modeling), in vivo, and in vitro evidence in ways that collectively mitigate the risk of failure modes for BE and support a framework for virtual BE studies. For example, while it may not be feasible to adequately characterize the long-term bioavailability of drugs from LAI products using in vivo or in vitro methods alone, it may be feasible to integrate limited in vivo and in vitro data with PBPK models that generate the remaining evidence needed to support a demonstration of BE. This area includes research on the use of MIE to evaluate failure modes for BE and to optimize the design of BE studies.
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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The Role of Tight Junctions in Skin Barrier Function and Dermal Absorption
B�_sler, Katja; Bergmann, Sophia; Heisig, Michael; Naegel, Arne; Zorn Kruppa, Michaela; Brandner, Johanna
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Modified Regulatory Pathways to Approve Generic Drugs in the Us and a Systematic Review of Their Outcomes
Kesselheim, Aaron; Polinski, Jennifer; Fulchino, Lisa; Isaman, Danielle; Gagne, Joshua
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Generic Lamotrigine Extended-Release Tablets are Bioequivalent to Innovator Drug in Fully Replicated Crossover Bioequivalence Study
Fang, Lanyan; Li, Zhichuan; Kinjo, Minori; Lomonaco, Sara; Zheng, Nan; Jiang, Wenlei; Zhao, Liang
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Assessment of Vehicle Volatility and Deposition Layer Thickness in Skin Penetration Models
Hamadeh, Abdullah; Troutman, John; Edginton, Andrea
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Physiologically Based Pharmacokinetic Modeling of Nanoparticles
Yuan, Dongfen; He, Hua; Wu, Yun; Fan, Jianghong; Cao, Yanguang
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Hypertension Pharmacogenomics: in Search of Personalized Treatment Approaches
Johnson, Julie
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Development of a Stochastic Individual Path (SIP) Model for Predicting the Deposition of Pharmaceutical Aerosols: Effects of Turbulence, Polydisperse Aerosol Size, and Evaluation of Multiple Lung Lobes
Longest, Worth; Tian, Geng; Delvadia, Renishkumar; Hindle, Michael
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Mathematical Modelling of the Viable Epidermis: Impact of the Cell Shape and Vertical Arrangement
Wittum, Rebecca; Naegel, Arne; Heisig, Michael; Wittum, Gabriel
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Application of Physiologically-Based Pharmacokinetic Modeling to Predict Gastric pH-Dependent Drug-Drug Interactions for Weak Base Drugs
Dong, Zhongqi; Li, Jia; Wu, Fang; Zhao, Ping; Lee, Sue-Chih; Zhang, Lillian; Seo, Paul; Zhang, Lei
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Use of Partial Area under the Curve Metrics to Assess Bioequivalence of Methylphenidate Multiphasic Modified Release Formulations
Stier, Ethan; Davit, Barbara; Chandaroy, Parthapratim; Chen, Meiling; Fourie Zirkelbach, Jeanne; Jackson, Andre; Kim, Stephanie; Lionberger, Robert; Mehta, Mehul; Uppoor, Ramana; Wang, Yaning; Yu, Lawrence; Conner, Dale