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ABSORPTION OF DRUGS FROM THE RAT SMALL INTESTINE
Abstract
The relative rates of absorption of a large number of drugs have been measured by perfusing solutions of drugs through the entire small intestine of the anesthetized rat. A single perfusion of the small intestine differentiated very rapid absorption from less rapid absorption. A continuous recirculation of the drug solution through the intestine separated less rapid absorption from very slow absorption. The degree of ionization of an organic electrolyte in solution appears to be one of the most important factors determining its absorption from the rat small intestine. Acidic drugs were rapidly absorbed if their pK a 9s were greater than 3. Basic drugs were rapidly absorbed if their pK a 9s were less than 8. The stronger acids and bases were relatively slowly absorbed and the absorption of very strong acids and bases was imperceptible. Absorption of drugs from the rat small intestine can be best explained by assuming simple diffusion of unionized drug across a barrier which may be lipoidal in nature.
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Citations
Cited by
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Pappenheimer, J. R., & Reiss, K. Z. (1987) · The Journal of Membrane Biology · doi:10.1007/bf02209145 · Cited by 522
50 years of oral lipid-based formulations: provenance, progress and future perspectives
Feeney, O. M., Crum, M. F., McEvoy, C. L., Trevaskis, N. L., Williams, H. D., Pouton, C. W., Charman, W. N., Bergström, C. A. S., & Porter, C. J. H. (2016) · Advanced Drug Delivery Reviews · doi:10.1016/j.addr.2016.04.007 · Cited by 426
The significance of acid/base properties in drug discovery
Manallack, D. T., Prankerd, R. J., Yuriev, E., Oprea, T. I., & Chalmers, D. K. (2013) · Chem. Soc. Rev. · doi:10.1039/c2cs35348b · Cited by 329
H + ‐coupled nutrient, micronutrient and drug transporters in the mammalian small intestine
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Metadata
- Authors
- Schanker, L. S., Tocco, D. J., Brodie, B. B., & Hogben, C. A. M.
- Venue
- The Journal of Pharmacology and Experimental Therapeutics
- Publisher
- Elsevier BV
- Published
- 1958-05
- Volume
- 123
- Issue
- 1
- Pages
- 81-88
- ISSN
- 0022-3565 (ISSN-L)
- OpenAlex
- W2224010948
- Cited by
- 371
- References
- 0
- FWCI
- 7.28
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: ABSORPTION OF DRUGS FROM THE RAT SMALL INTESTINE. https://app.cochat.ai/papers/10.1016/s0022-3565(25)12018-1
- The paper
- Schanker, L. S., Tocco, D. J., Brodie, B. B., & Hogben, C. A. M. (1958). ABSORPTION OF DRUGS FROM THE RAT SMALL INTESTINE. The Journal of Pharmacology and Experimental Therapeutics. https://doi.org/10.1016/s0022-3565(25)12018-1
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.