1. Bcs Class 1 Drugs

The FDA guidance on application of the biopharmaceutics classification system (BCS) for waiver of in vivo bioequivalence (BE) studies was issued in August 2000. Since then, this guidance has created worldwide interest among biopharmaceutical scientists in regulatory agencies, academia, and industry toward its implementation and further expansion. This article describes how the review implementation of this guidance was undertaken at the FDA and results of these efforts over last dozen years or so across the new, and the generic, drug domains are provided. Results show that greater than 160 applications were approved, or tentatively approved, based on the BCS approach across multiple therapeutic areas; an additional significant finding was that at least 50% of these approvals were in the central nervous system (CNS) area.

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Bcs Class 1 Drugs

These findings indicate a robust utilization of the BCS approach toward reducing unnecessary in vivo BE studies and speeding up availability of high quality pharmaceutical products. The article concludes with a look at the adoption of this framework by regulatory and health policy organizations across the globe, and FDA’s current thinking on areas of improvement of this guidance. • Ca' Foscari University of Venice • Cagliari State University • Free University of Bolzano • Politecnico di Bari • Scuola Superiore Sant'Anna • University of Bologna • University of Camerino • University of Genoa • University of Messina • University of Naples Federico II • University of Padova • University of Palermo • University of Parma • University of Pavia • University of Perugia • University of Pisa • University of Roma TRE • University of Rome Tor Vergata • University of Siena • University of Verona.

BIOPHARMACEUTICS CLASSIFICATION OF THE DRUG SUBSTANCE 37 BCS-based biowaivers are applicable to drug products where the drug substance exhibits high 38. Solubility and, either high permeability (BCS Class I) or low permeability (BCS Class III). A biowaiver is only applicable when the drug substance(s) in test and reference. The Biopharmaceutical Classification System (BCS) is an experimental model that measures permeability and solubility under prescribed conditions. The original purpose of the system was to aid in the regulation of post-approval changes and generics, providing approvals based solely on in vitro data when appropriate.

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