<qa>  What is the name of the drug that is used to treat grapefruit juice?11. Regular consumers of grapefruit juice, or currently taking medications known to be metabolized by CYP 3A4 cyclosporine, itraconazole, ketoconazole, erythromycin, clarithromycin, telithromycin, HIV protease inhibitors, and nefazodone 