Prevasel 10 contains the active ingredient pravastatin 10mg. Pravastatin has a lipid-lowering effect by reducing cholesterol biosynthesis by reversibly inhibiting 3-hydroxy-3 methylglutaryl coenzyme A (HMG-CoA), the enzyme that catalyses the conversion of HMG-CoA to mevalonate, which is involved in these steps. the first step in cholesterol synthesis.