Simvastatin
Prodrug. Being an inactive lactone, after ingestion, it hydrolyses to the β-hydroxyl metabolite, which competitively inhibits HMG-CoA reductase, an enzyme that converts 3-hydroxy-3-methylglutaryl coenzyme A into mevalonic acid, a precursor of styrene, including cholesterol in hepatocytes .
It inhibits the synthesis of cholesterol in the liver, which leads to an increase in the density of low-density lipoprotein receptors on hepatocytes. As a result, the capture of low density lipoprotein from the blood plasma increases, which leads to a decrease in the concentration of cholesterol and lipoproteins in the blood plasma.
In a dose of 40 mg lowers the concentration in the plasma: cholesterol by 30-46%, low density lipoprotein - by 40-60%, triglycerides - by 14-33%, apolipoprotein B100 - by 35-50%; increases the concentration of high-density lipoproteins and apolipoprotein A.
Has a positive effect on the intima of the vessels in the preclinical phase of the development of atherosclerosis due to antiproliferative and antioxidant effects, improves the rheological properties of the blood. Minimizes the risk of vascular complications of coronary heart disease, reduces the risk of repeated myocardial infarction.
Ezetimibe
It blocks the absorption of cholesterol in the small intestine, preventing it from entering the liver. Does not affect the absorption of triglycerides, fatty acids, progesterone, ethinyl estradiol, fat-soluble vitamins A and D.