List of products in the National Drug Code with proprietary name . This medication is used to treat high blood pressure (hypertension). Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Aliskiren works by relaxing blood vessels so blood can flow more easily. It belongs to a class of drugs known as direct renin inhibitors. This drug is not recommended for use in children younger than 2 years due to an increased risk of side effects.