Increase risk of myopathy/rhabdomyolysis w/ potent inhibitors of CYP3A4 (eg itraconazole, ketoconazole, erythromycin, clarithromycin, telithromycin, HIV protease inhibitors, nefazodone); gemfibrozil, niacin & other fibrates; cyclosporine or danazol; amiodarone or verapamil; diltiazem. Increase the plasma levels of HMG-CoA reductase inhibitory activity w/ grapefruit juice. Potentiate the effect of coumarin anticoagulants.