Can I take Candesartan and Cod liver oil together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
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Taking cod liver oil alongside candesartan may cause your blood pressure to drop slightly lower than intended. This could potentially make you feel dizzy or light-headed, especially when standing up quickly.
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Why this happens
Candesartan is a medication prescribed specifically to lower blood pressure. Cod liver oil contains omega-3 fatty acids, which have a natural, mild blood-pressure-lowering effect. When used together, these effects can add up (an additive effect).
What you should do
Back to contentsIt is generally safe to take these together, but you should monitor your blood pressure regularly. If you feel dizzy, faint, or unusually tired, speak to your doctor or pharmacist. They may suggest adjusting the timing of your doses or checking your blood pressure more frequently.
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Important precautions
Back to contentsPregnancy
You must not take candesartan 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.
Food and drink warnings
Back to contentsAlcohol
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). You should avoid using potassium-based salt substitutes unless advised otherwise by your doctor.
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Using other medicines
Back to contentsTaking 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.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
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