These medications help your heart to work more efficiently. Angiotensin II constricts blood vessels.
Aldosterone causes the kidneys to retain salt and water and to excrete potassium.
This leads to an increase in blood volume and blood pressure. If you are taking ACE inhibitors, you may develop a persistent dry cough. Sometimes the cough will interfere with your ability to talk. This problem may improve with a change of dose or by taking additional medications. Weakness, rash, and fever are other potential side effects, but they are rare.