This document summarizes research on how fruit juices can interact with common medications. Some key points: - Fruit juices contain compounds like flavonoids and furanocoumarins that can inhibit the metabolism of drugs by cytochrome P450 enzymes and p-glycoprotein transporters. - Grapefruit juice is a known inhibitor of CYP3A4 and has been shown to increase levels of drugs metabolized by this enzyme, like felodipine and sildenafil. - Other juices like apple, cranberry, and orange have also been found to inhibit drug metabolism and transporters, potentially affecting drugs like fexofenadine and aliskiren. - Limited evidence suggests cran