Answers:
http://www.medicinenet.com/pravastatinbu...
It lowers the cholesterol in the blood. That is the simple explanation.
Pravastatin is used together next to lifestyle change (diet, weight-loss, exercise) to drain the amount of cholesterol (a fat-like substance) and other fatty substances contained by the blood. Pravastatin is in a class of medication call HMG-CoA reductase inhibitors (statins). It works by slowing the production of cholesterol in the body.
Statins lower cholesterol.