What is benazepril-amlodipine used for? Benazepril-amlodipine is used to lower high blood pressure in adults by causing the blood vessels to relax. As a result, blood pressure decreases and the heart can easily pump more blood to the rest of the body. Benazepril-amlodipine has not been approved for use in children and, at this time, there are no universally accepted off-label uses of this drug.