Can I take Chinese herbs with warfarin?

Do not start herbs without review by your prescribing clinician or anticoagulation service. Some herbs can increase or reduce warfarin’s effect. If treatment is considered appropriate, your medical team may arrange extra INR checks when herbs are started, stopped or changed.[2][5]

Can I take herbs with antidepressants?

It depends on the antidepressant and the herbs. St John’s wort, for example, has documented interactions with several antidepressants.[1] That does not mean all Chinese herbal formulas have the same risk. Bring the exact medicine name and dose so we can review the proposed formula and involve your prescriber or pharmacist when needed.

Does taking herbs a few hours apart from medication prevent interactions?

Spacing them apart may help with some absorption-related interactions, but it does not prevent all interactions. Effects on drug breakdown or blood clotting can last beyond the time you take a dose.[1] Follow advice specific to your medicines and formula rather than relying on a fixed time gap.

Should I stop herbs before surgery?

Your surgical or anesthesia team may ask you to stop them, sometimes at least two weeks beforehand. Tell them what you take as early as possible and follow their instructions for your procedure.[4]

Do I need to tell my doctor I take herbs?

Yes. Share the ingredient list with your doctor and pharmacist, and tell us about any changes to your medication. Having the same information helps everyone involved in your care make better decisions.

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Chinese Herbal Medicine

How herbal formulas are chosen, how quality and safety are checked, and how herbs are reviewed alongside your medications.

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Chinese Herbs and Prescription Medications: Checking for Interactions
Guide · October 23, 2026
Taking medication does not automatically rule out Chinese herbal medicine. Learn how our drug–herb interaction checklist helps guide the review of each customized formula.