Can I take Candesartan cilexetil and Ceremonial matcha together?

Why this happens

Matcha contains high levels of catechins (antioxidants) and caffeine. Catechins can have a natural blood-pressure-lowering effect, which adds to the effect of the candesartan (an additive effect). Furthermore, some compounds in green tea may slightly interfere with the enzymes or transport proteins that handle drugs in the body, potentially altering how much medicine stays in your system.

What you should do

It is generally safe to enjoy matcha in moderation, but you should monitor your blood pressure regularly. Avoid drinking large amounts of ceremonial matcha (more than 2-3 bowls a day) until you know how it affects you. If you feel dizzy or weak, sit down immediately and inform your doctor. Try to keep your matcha consumption consistent rather than having a lot one day and none the next.

Important precautions

Pregnancy

You must not take this medicine if you are pregnant. It can cause serious harm or death to an unborn baby, especially if used during the second and third trimesters. Use effective contraception while taking it.

High potassium (Hyperkalaemia)

Candesartan increases potassium levels in your blood. Matcha also contains significant potassium. Avoid using potassium supplements or salt substitutes containing potassium, as excessively high levels can cause heart rhythm problems.

Food and drink warnings

Alcohol

Drinking alcohol while taking candesartan can increase the blood-pressure-lowering effect of the medicine. 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 before drinking.

Potassium-rich foods (e.g., bananas, spinach, salt substitutes)

Candesartan can increase the levels of potassium in your blood. Consuming large amounts of foods very high in potassium or using potassium-based salt substitutes (such as Lo-Salt) can lead to dangerously high potassium levels (hyperkalaemia).

Ceremonial Matcha / Green Tea

Matcha and green tea contain caffeine and other compounds that can naturally raise blood pressure or interfere with how blood pressure medications work. While small amounts are usually fine, large quantities of highly concentrated matcha might counteract the blood-pressure-lowering effects of candesartan.

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.