Quinapril remedy applied treats high blood pressure alone or with different drugs. It can be used for different conditions as prescribed by doctor. Generic Quinapril ACE inhibitor works by relaxing blood vessels and reduces blood pressure. Pregnant women should avoid using this medication. ACE inhibitor stops your body from creating hormone known as angiotensin II. Thus relaxes blood vessels and reduces the quantity of water put back into blood by kidney, thus decreasing blood pressure. High blood pressure can damage the coronary heart and damage blood vessels, leading to heart stroke.