Strong CYP3A4 inhibitors (clarithromycin/erythromycin, ketoconazole/itraconazole, HIV protease inhibitors, cobicistat), cyclosporine, fibrates (especially gemfibrozil), niacin, colchicine, amiodarone, verapamil/diltiazem, warfarin (INR monitoring), digoxin, grapefruit juice