Angiotensin Converting Enzyme (ACE) Inhibitors

Captopril, Enalapril, Lisinopril, Perindopril, Ramipril belong to a group of medicine which are used to treat high blood pressure known as angiotensin converting enzyme (ACE) inhibitors.


What is this medication used for

ACE-inhibitors lower blood pressure by reducing the production of a substance called angiotensin II which causes the blood vessels to narrow. When the blood vessels open up, your blood pressure will be lowered. 


Dosage and How to Use​​

  • Do not stop taking your medicines without checking with your doctors.
  • If you miss a dose, take the missed dose as soon as you remember. If it is almost time for your next dose, take only the usual dose. Do not double your dose or use extra medicine to make up for the missed dose.


Side Effects, Precautions, Contraindicat​​​ion

What are the possible side effects of the medi​cines?

The most common side effect is a dry, annoying cough that does not go away. Other side effects are rare and include rash, loss of taste and lightheadedness on getting up from a sitting or sleeping position.​​​​

How do I know if I am allergic to these medicines?​

The symptoms of a drug allergy include one or more of the following: 

  • Swollen face/eyes/lips 
  • Difficulty in breathing ​
  • Itchy skin rashes over your whole body​

If you experience any of these symptoms, you should stop your medicine immediately and see your doctor. ​

What precautions sh​​ould I follow when taking the medicines?

If you are pregnant or planning to get pregnant, you should inform your doctor.  

Let your doctor know if you are taking any other medicines.

Your doctor may need to monitor you for electrolyte levels when you are on this medicine.​


Handling and Storage

  • Keep your medicines in the original container or packaging, tightly closed or sealed in a cool and dry place, away from direct sunlight.
  • Keep the medicine out of reach of children.
  • Throw away all expired medicines.


This article answers some common questions about this medicine. It does not contain all the available information. It also does not take the place of talking to your doctor or pharmacist.


Angiotensin Converting Enzyme (ACE) Inhibitors

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