After stabilization on atorvastatin 10 mg , hypercholesterolemic subjects 65 years at high/very high risk for CHD and not at LDL-C < 1.81 mmol/L ( with atherosclerotic vascular disease [ AVD ] ) or < 2.59 mmol/L ( without AVD ) were randomized to ezetimibe 10 mg plus atorvastatin 10 mg or uptitration to atorvastatin 20 mg ( 6 weeks ) followed by uptitration to 40 mg ( additional 6 weeks ) .