EIRMC Close Window
Library Search Go Advanced Search
Español (Inicio)


Discharge Instructions: Taking Blood Pressure Medications

You have been diagnosed with high blood pressure (hypertension). Diet and exercise help control high blood pressure. Many people also need the help of one or more medicines. Here are the main types of blood pressure medicines and how they work.


Diuretics are sometimes called "water pills" because they work in the kidney and flush excess water and sodium (salt) from the body. These are one of the most common and  important medicines for the management of blood pressure.


Beta-blockers reduce nerve impulses to the heart and blood vessels. This makes the heart beat slower and with less force. Your blood pressure drops, and your heart does not have to work as hard, which may improve pumping function.

ACE inhibitors

ACE inhibitors cause the vessels to relax. This helps the blood flow better and lowers blood pressure.

Angiotensin antagonists

Angiotensin antagonists shield blood vessels from a hormone that causes the blood vessels to get stiff and narrow. Your vessels become wider, and your blood pressure goes down.

Calcium channel blockers (CCBs)

CCBs keep calcium from entering the muscle cells of the heart and blood vessels. This causes blood vessels to relax, and your blood pressure goes down.


Alpha-blockers reduce nerve impulses to blood vessels. This allows blood to pass easily, causing blood pressure to go down.

Alpha-beta blockers

Alpha-beta blockers work the same way as alpha-blockers but also slow your heartbeat. As a result, less blood is pumped through your blood vessels and your blood pressure goes down.


Vasodilators directly open blood vessels by relaxing the muscle in the vessel walls, causing blood pressure to go down.

© 2000-2019 The StayWell Company, LLC. 800 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.