Xylose Test: Effect of Aspirin and Indomethacin

Abstract
The xylose test was used to assess the effect of drugs on intestinal absorption. Both aspirin and indomethacin reduced the urinary output of xylose. By giving xylose intravenously as well as orally it was found that aspirin had a parenteral effect, probably impairing renal function, whereas indomethacin depressed intestinal absorption.