Can I take Candesartan and Eplerenone together?

Why this happens

Both candesartan and eplerenone work by affecting a hormone system in the body that regulates salt and water balance. Specifically, they both cause the kidneys to keep hold of potassium rather than flushing it out in the urine. When used together, this 'potassium-sparing' effect is doubled.

What you should do

You must speak to your doctor before taking these together. If prescribed both, your doctor will need to monitor your kidney function and potassium levels very closely with regular blood tests. Seek medical help immediately if you experience muscle weakness, tingling sensations, or an irregular heartbeat. Avoid using salt substitutes containing potassium (such as Lo-Salt) while taking these medicines.

Important precautions

Pregnancy

You must not take these medicines if you are pregnant or planning to become pregnant. They can cause serious harm or death to an unborn baby, particularly if used during the second and third trimesters.

High potassium levels (Hyperkalaemia)

Both medicines increase potassium levels in your blood. You must avoid using potassium supplements or salt substitutes containing potassium, as dangerously high levels can cause life-threatening heart rhythm problems.

Kidney function and NSAID use

Taking anti-inflammatory painkillers (like ibuprofen or naproxen) while on these medicines can significantly increase the risk of sudden kidney failure. Check with a pharmacist before using any over-the-counter pain relief.

Food and drink warnings

Alcohol

Drinking alcohol while taking these medicines can cause your blood pressure to drop too low. This may make you feel dizzy, lightheaded, or faint, especially when standing up. It is best to keep your alcohol intake within recommended limits and see how the medicine affects you first.

Grapefruit juice

You should avoid drinking large amounts of grapefruit juice. Grapefruit contains compounds that can increase the level of eplerenone in your blood, which may increase the risk of side effects.

Using other medicines

Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.