The most desirable route of administration for any drug is oral, for reasons of patient compliance and marketability. However, there are significant obstacles which an oral compound must overcome in order to become systemically available. Instability in the gastric milieu, solubility in the GI tract, intestinal absorption
(dictated by both passive permeability and transporter interactions), and metabolism by enzymes in the gut and liver are some of the major challenges.
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Species: Rat and Dog