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Heart Failure Health Center

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Heart Failure and ACE Inhibitors

ACE inhibitors are a vasodilator; that means they dilate (or widen) the blood vessels to improve blood flow, which helps to decrease the amount of work the heart has to do. They also block some of the harmful substances in the blood (angiotensin) that are produced as a result of heart failure. Angiotensin is one of the most powerful vasoconstrictors (they narrow the blood vessels) in the body.

ACE inhibitors are critical in the treatment of heart failure when systolic dysfunction is present and may also be prescribed for the treatment of diastolic dysfunction.

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They are also used to control high blood pressure, prevent kidney damage in diabetics and prevent ongoing heart damage after a heart attack. ACE inhibitors include:

How Do I Take an ACE Inhibitor?

ACE inhibitors are usually taken on an empty stomach one hour before meals. Follow the label directions on how often to take your medication. The number of doses you take each day, the time allowed between doses, and how long you need to take the drug will depend on the type of ACE inhibitor prescribed, as well as your condition.

What Are the Side Effects of ACE Inhibitors?

  • Red, itchy skin rash: Contact your doctor; do not treat the rash yourself.
  • Dizziness, lightheadedness, or faintness upon rising: This side effect may be strongest after the first dose, especially if you have been taking a diuretic (water pill). Get up more slowly. Contact your doctor if these symptoms persist or are severe.
  • Salty or metallic taste and a decreased ability to taste: This effect usually goes away as you continue taking the medication.
  • Cough: If this symptom persists or is severe, contact your doctor. Otherwise, ask your doctor what type of cough medicine you may use to control the cough.
  • Sore throat; fever; mouth sores; unusual bruising; fast or irregular heart beat; chest pain; swelling of feet, ankles, lower legs: Contact your doctor.
  • Confusion; irregular heartbeat; nervousness; numbness or tingling in hands, feet, or lips; shortness of breath or difficulty breathing; weakness or heaviness in legs: These are signs of too much potassium in the body. Contact your doctor right away.
  • Swelling of your neck, face, and tongue: This is a medical emergency. Seek emergency medical treatment immediately: Call 9-1-1 or go to the nearest emergency department.

If you become sick with severe vomiting or diarrhea, you may become dehydrated, which can lead to low blood pressure. Contact your doctor. Also contact your doctor if you have any other symptoms that cause concern.

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