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https://www.selleckchem.com/products/npd4928.html Commercial formulations of 29 commonly used herbal supplements (HSs) and grapefruit juice were evaluated for drug interaction potential via quantification of their CYP3A inhibitory potential in two in vitro experimental models of human small intestine, cryopreserved human intestinal mucosa (CHIM), and cryopreserved human enterocytes (CHEs). Two CYP3A substrates were used-in the studies with CHIM, CYP3A activity was quantified via liquid chromatography tandem mass spectrometry quantification of midazolam 1'-hydroxylation, whereas in CHE, luciferin-IPA metabolism to luciferin was quantified by luminescence. Upon treatment of CHIM with the estimated lumen concentration of the HS upon each oral administration (manufacturers' recommended dosage dissolved in 200 ml of culture medium), >80% CYP3A inhibition was observed for green tea extract, St. John's wort, valerian root, horehound, and grapefruit juice. Less than 50% inhibition was observed for fenugreek, aloe vera, guarana, soy isoflavone, maca, echinacea, spiruuation of 29 popular herbal supplements in cryopreserved human intestinal mucosa identified green tea extract, horehound, St. John's wort, and valerian root to have CYP3A inhibitory potential similar to that for grapefruit juice, suggesting their potential to have clinically significant pharmacokinetic interaction with orally administered drugs that are CYP3A substrates. The results suggest that cryopreserved human intestinal mucosa can be used for in vitro evaluation of drug interactions involving enteric drug metabolism. Multiple modalities are available to introduce patient safety training to healthcare professionals. In internal medicine, clinical rounds have always played an important role in education; however, the patient safety content taught at the point of care is not well studied. We studied, both quantitatively and qualitatively, the number and nature of patient safety messages delivered by attending

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