Can I take Garlic supplements and Losartan together?

Why this happens

Both garlic and losartan work to lower blood pressure. Garlic has natural properties that relax blood vessels, which adds to the effect of the medication (an additive effect). Additionally, some studies suggest garlic might slightly interfere with the enzymes in the liver that process losartan, though the blood-pressure-lowering effect is the primary concern.

What you should do

You should monitor your blood pressure regularly at home. If you feel dizzy or faint, contact your GP, as your dose of losartan may need adjusting. It is best to inform your doctor before starting any high-dose garlic supplements.

Important precautions

Pregnancy

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

Surgery or dental procedures

Garlic can thin your blood and increase the risk of bleeding. You must stop taking garlic supplements at least 7 to 14 days before any planned surgery or dental work.

Taking blood-thinning medications (e.g., warfarin, clopidogrel)

Garlic supplements can significantly increase the effect of blood-thinning medicines, making you more likely to bruise or bleed dangerously.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol when taking garlic supplements. Both garlic and alcohol can have blood-thinning effects; combining them may increase your risk of bruising or bleeding. Additionally, alcohol can irritate the stomach lining, which may worsen the digestive side effects sometimes caused by garlic.

It is best to avoid or strictly limit alcohol while taking losartan. Alcohol can increase the blood-pressure-lowering effect of the medicine, which may make you feel dizzy, lightheaded, or faint, especially when standing up.

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

Losartan can increase the levels of potassium in your blood. You should avoid using salt substitutes containing potassium and speak to your doctor before significantly increasing your intake of potassium-rich foods, as high potassium levels can affect your heart rhythm.

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.