Biopharmaceutical Classification System

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  • Whenever a new drug moiety is discovered, one of the 1st questions a pharmaceutical company asks is….whether or not the drug can be effectively administered by the oral route, for its intended use
    Biopharmaceutical Classification System (BCS) is a scientific framework for classifying drug substances based on their aqueous solubility and intestinal permeability
  • Biopharmaceutical Classification System (BCS) is a scientific framework for classifying drug substances based on their aqueous solubility and intestinal permeability
  • BCS was originally used to grant biowaivers for scale-up and post-approval changes for drug products, but was later extended to the approval of new generic products.
  • FDA suggests as a potential internal standard
  • (Determination in Caco II cells only applicable to passively absorbed substances)
  • A drug substance is considered “highly soluble” when the highest clinical dose strength is soluble in 250 mL or less of aqueous media over a pH range of 1–7.5 at 37 °C

  • when the dissolution rate is much greater than the gastric emptying, dissolution is not likely to be rate-limiting
  • BCS Can be used to obtain a biowaiver
  • It has been estimated that the application of BCS can result in annual savings of $35 million for
    the pharmaceutical industry
  • Reference: Particle size; Drug development services; Technical Brief 2011 Volume 9