List of products in the National Drug Code with proprietary name . This product is used to treat certain types of heart failure. It may help you live longer and lower your chance of having to go to the hospital for heart failure. This product contains 2 medications: sacubitril and valsartan. Sacubitril belongs to a class of drugs called neprilysin inhibitors and valsartan belongs to a class of drugs called angiotensin receptor blockers (ARBs). They work by relaxing blood vessels so that blood can flow more easily, which makes it easier for your heart to pump blood to your body.