Skip to main content

Can I take Garlic supplements and Losartan together?

Drug interaction guide

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.

Continue reading below

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.

Continue reading below

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.

Continue reading below

Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 25 Jan 2026 | Originally published
flu eligibility checker

Ask, share, connect.

Browse discussions, ask questions, and share experiences across hundreds of health topics.

symptom checker

Feeling unwell?

Assess your symptoms online for free

Sign up to the Patient newsletter

Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.

Please enter a valid email address

By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.