Can I take Garlic supplements and Losartan together?
Drug interaction guide
Originally published 14 Mar 2026
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Taking garlic supplements with losartan may cause your blood pressure to drop lower than intended. This can lead to symptoms like dizziness, lightheadedness, or feeling faint, especially when standing up quickly.
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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
Back to contentsYou 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.
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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.
14 Mar 2026 | Originally published

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