Can I take Black garlic and Devil's claw together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
- Audio Version
- Add to preferred sources on Google
Taking black garlic and devil's claw together may increase your risk of bruising or bleeding. This is because both supplements have properties that can thin the blood or prevent it from clotting properly.
Why this happens
Both black garlic and devil's claw have 'antiplatelet' effects. This means they make the tiny cells in your blood (platelets) less sticky, which makes it harder for your blood to form clots. When used together, these effects can add up.
What you should do
Use this combination with caution. If you notice unusual bruising, nosebleeds, or bleeding gums, stop taking them and speak to your doctor. You should stop taking both supplements at least two weeks before any planned surgery or dental work. If you are already taking prescribed blood-thinning medications (like warfarin or aspirin), do not take these supplements without medical advice.
Important precautions
Surgery or bleeding disorders
Both medicines can thin the blood and increase the risk of bleeding. You must stop taking them at least 2 weeks before any planned surgery or dental procedure.
Stomach ulcers or gallstones
Devil's claw increases stomach acid and bile production. Do not use it if you have stomach ulcers, duodenal ulcers, or gallstones, as it can severely worsen these conditions.
Diabetes medication
Devil's claw can lower blood sugar levels. If you take insulin or other diabetes medicines, you must monitor your blood sugar closely as your dose may need adjustment to prevent hypoglycaemia.
Food and drink warnings
Alcohol
Black garlic may have a mild blood-thinning effect. While there is no direct contraindication, excessive alcohol consumption can also thin the blood and increase the risk of bleeding or bruising. Use alcohol in moderation.
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.
Patient picks for Drug interactions

Drug interactions checker
Can I take Mounjaro and Insulin together?
Taking Mounjaro (tirzepatide) and insulin together significantly increases your risk of having a 'hypo' (hypoglycaemia), which is when your blood sugar levels drop too low. Symptoms of a hypo can include feeling shaky, sweaty, dizzy, hungry, or confused. In severe cases, it can be dangerous.

Drug interactions checker
Can I take Mounjaro and Metformin together?
When taken together, Mounjaro and Metformin can increase the risk of your blood sugar levels dropping too low (hypoglycaemia). While both drugs work to lower blood sugar, they do so in different ways, which can sometimes lead to an additive effect. Additionally, Mounjaro slows down how quickly your stomach empties, which might slightly change how your body absorbs Metformin, though this is usually not a major concern.
Article history
The information on this page is written and peer reviewed by qualified clinicians.
Article also available in English, German, Spanish, French, Italian, Portuguese, Hindi, Hebrew, Arabic, and Swedish.
25 Jan 2026 | Originally published
Join the conversation
Share your thoughts or experiences with others in our patient communities.

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

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.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.
More in drug interactions checker
- Can I give my child antihistamines?
- Can I take Amitriptyline and Trazodone together?
- Can I take Amlodipine and Lansoprazole together?
- Can I take antihistamines with alcohol?
- Can I take Aspirin and Paracetamol together?
- Can I take Atorvastatin and Chaga together?
- Can I take Atorvastatin and Levothyroxine together?
- Can I take Chaga and Cordyceps together?
- Can I take Doxazosin and Evolocumab together?
- Can I take Esomeprazole and Magnesium together?
- Can I take Fluanxol and Pregabalin together?
- Can I take Folic acid and Vitamin D together?
- Can I take Levothyroxine and Omeprazole together?
- Can I take Magnesium and Vitamin D together?
- Can I take Omeprazole and Pyridostigmine together?
- Can I take Pancreatin and Lixiana together?
- Can I take Pyridostigmine and Ramipril together?
- Can I take Ramipril and Ibuprofen together?
- Can I take St John's wort and Sertraline together?
- Can I take Tizanidine and Trazodone together?