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Candesartan

Medication Information Leaflet
  • Article last reviewed 01 April 2026
  • 5 mins read

What is this medication for?

Candesartan is used to treat high blood pressure. It blocks the effects of a substance called Angiotensin II at the blood vessel walls. Angiotensin II causes the blood vessels to narrow, and this causes an increase in blood pressure. 

This medication can also be used for patients who have protein in their urine and other heart conditions.

How should I take or use this medication?

  • Do not stop taking your medicine without checking with your healthcare provider
  • This medicine may be taken with or without food

What should I do if I forget to take or use this medication?

  • 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.

What precautions should I take when taking or using this medication?

Inform your healthcare professional if:

  • You are allergic to this medication or any of the other ingredients of this medication
  • You are pregnant, planning to become pregnant, or breastfeeding. Once you find out you are pregnant, stop the medication as soon as possible. Taking this medication can cause injury and death to your developing fetus.
  • You are taking any other medications, including supplements, traditional medications and herbal remedies.
  • Your doctor may need to monitor your potassium levels and kidney function when you are on this medication.

What are some common side effects of this medication? ​

The side effects include dizziness and lightheadedness on getting up.

What are some rare but serious side-effects that I need to seek medical advice immediately? 

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

  • Swollen face/eyes/lips/tongue
  • Difficulty 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.

Very rarely, this medicine can injure or damage the liver. A liver injury may recover on its own. However in some cases, it can cause serious liver damage. Stop this medicine and see a doctor immediately if you notice dark-coloured urine or light-coloured stools, or if you experience nausea, vomiting, loss of appetite, stomach pain or yellowing of your eyes or skin. This side effect has a very low chance of occurring. Most patients take this medicine with no problems. 

Check with your doctor or pharmacist if you have any concerns regarding your medicines.

How should I store this medication?

Store in a cool and dry place, away from direct sunlight. Keep this medication away from children.

How do I throw away this medication safely? ​

Pack this medicine into a black trash bag and seal it tightly before throwing into the rubbish chute or bin. 

Disclaimer

The content of this article does not replace the information from your healthcare professional. Please consult your healthcare professional for more information. 

This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (NHG Health, National University Health System and SingHealth), community pharmacies (Guardian, Unity and Watsons) and Pharmaceutical Society of Singapore (PSS). 

The images and video in this article has been developed by the Singapore National Asthma Programme (SNAP) and have been reviewed by the PSS-National Medication Information workgroup.