Rosuvastatin works by reducing low density lipoprotein (LDL) levels. It works by slowing down the production of cholesterol, thereby lowering the blood cholesterol levels. By activating the lipoprotein lipase enzyme, the other drug reduces the levels of triglycerides in the blood and thereby lowers the risk of other complications associated with high triglyceride levels. Together, these two medications can help improve lipid profiles and reduce the risk of cardiovascular disease.