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Herbal supplements and heart medicines may not mix

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By Mayo Clinic Staff

Herbal supplements are natural, so they must be safe, right? No, that's not true all the time.

Herbal supplements can strongly affect the body. Some don't work well with prescription medicines. This is called a medicine interaction. Herbal supplements can interact with medicines used to treat heart and blood vessel conditions, such as high blood pressure and heart failure. Some medicine interactions can be risky.