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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Investigation of drug absorption from the gastrointestinal tract of man. V. Effect of the beta-adrenoceptor antagonist, metoprolol, on postprandial gastric function.

The role of the adrenergic system in normal gastric function was assessed in five healthy volunteers by measuring gastric secretion and emptying after a mixed meal containing a non-absorbable marker, [14C]-PEG 4000, with and without 100 mg of metoprolol, a beta 1-adrenoceptor antagonist. Intraduodenal perfusion of PEG 4000, and gastric and jejunal sampling was achieved by means of a gastrointestinal intubation technique. Gastric function was assessed from the degree of dilution of the duodenal marker. Analysis of acid content by titration allowed the gastric acid secretory rate to be determined. Gastric emptying of a meal over 4 h was similar with and without metoprolol, the time to 50% emptying being 100 min. In the presence of metoprolol, gastric acid content was significantly increased during the late postprandial period producing a corresponding increase in acid load delivered to the duodenum. beta 1-adrenoceptor blockade appears to prolong the gastric secretory response to food without altering gastric emptying.[1]

References

  1. Investigation of drug absorption from the gastrointestinal tract of man. V. Effect of the beta-adrenoceptor antagonist, metoprolol, on postprandial gastric function. Jobin, G., Cortot, A., Danquechin-Dorval, E., Godbillon, J., Schoeller, J.P., Bernier, J.J., Hirtz, J. British journal of clinical pharmacology. (1985) [Pubmed]
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