Cholesterol is a type of fat (called a lipid). It is made naturally in your body from the food that you eat. When the concentration of cholesterol in your blood becomes too high, it is called hypercholesterolaemia. In people with hypercholesterolaemia, small fatty patches (called atheroma) can develop within the inside lining of their blood vessels. Over time, these patches make blood vessels narrower, and this is called atherosclerosis, or 'hardening of the arteries'. This 'narrowing' reduces the blood flow through the arteries and it increases the risk of a number of heart and blood vessel diseases, such as heart attack and stroke.
This is a companion discussion topic for the original article at https://patient.info/medicine/ezetimibe-tablets-ezetrol