Absorption is defined as the disappearance of a drug from the site of administration and its appearance in the blood (“central compartment”) or at its site of action. The main routes of administration are oral or parenteral (injection). After oral administration, a drug has to be taken up (is absorbed) from the gut. Here, the main site of absorption is the small intestine. In this case, only a portion of drug reaches the blood and arrives at its site of action.
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© 2008 Springer-Verlag Berlin Heidelberg New York
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(2008). Absorption. In: Offermanns, S., Rosenthal, W. (eds) Encyclopedia of Molecular Pharmacology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-38918-7_5005
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DOI: https://doi.org/10.1007/978-3-540-38918-7_5005
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-38916-3
Online ISBN: 978-3-540-38918-7
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