What supplements should I avoid before surgery?

Dr. Michael Roizen, MD
Internal Medicine
No matter how much you love 'em, you have to quit taking certain supplements for at least a week before surgery and stay away from them for as long afterward as your doctor instructs -- otherwise you could turn yourself into an unfortunate statistic. One set of common consumables you should stop taking a week before surgery is the "G Family": garlic, ginger, ginkgo biloba, and ginseng. These can seriously increase the odds for bleeding during surgery.

Below is a list that I give patients, but it's by no means complete; let your surgeon and your anesthesiologist know everything that you take well before you're being wheeled into the operating room because many of these supplements stay in your bloodstream for several days.
  • Dehydroepiandrosterone (DHEA), Eicosapentaenoic acid (EPA), fish oils, garlic, onion, and Vitamin E. These supplements can affect blood clotting after surgery.
  • Feverfew, ginkgo biloba, Coenzyme Q10, ginger, and ginseng can interact with Warfarin, a common blood-thinning drug, and possibly cause bleeding.
  • Hawthorn berry, kyushin, licorice, plantain, uzara root and ginseng can interact with Digoxin, a heart drug many patients receive during and after surgery, and the interaction could be fatal.
  • St. John's wort can interact dangerously with a number of drugs, including Digoxin, Warfarin, oral contraceptives, Cyclosporin, and antiviral drugs.
  • Iron can reduce the bioavailability of other drugs.
  • Caffeine can affect your blood pressure, and caffeine withdrawal after surgery causes headaches (ask for a cup in the recovery room if you're a java junkie).
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Everyone needs to become a smart patient. In fact, in the worst cases, your life may even depend on it. Number one bestselling authors and doctors Michael Roizen and Mehmet Oz have written this...

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Dietary Supplements

Whether you're visiting the drug store, grocery or natural food shop you'll likely find an aisle where there are jars and bottles of things for you to put in your body that are neither foods nor medicines. Ranging from vitamins an...

d minerals to fiber and herbal remedies, these supplements are not regulated in the same way as either food or medicine. Some of them are backed by solid research, others are folk remedies or proprietary cures. If your diet does not include enough of certain vitamins or minerals, a supplement may be a good idea. Natural treatment for conditions like constipation may be effective. But because these substances are unregulated, it is always a good idea to educate yourself about the products and to use common sense when taking them. This is even more true if you are pregnant or taking a medicine that may be affected by supplements.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.