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Surgery Patients Unaware of Herbal Risk

Many Don't Know That Some Herbal Supplements Before Surgery Raise Risk of Bleeding
WebMD Health News
Reviewed by Louise Chang, MD

April 16, 2009 -- Most patients facing elective surgery still don't tell their surgeons or anesthesiologists about herbal supplements they are taking; many doctors still don't ask, and the failure to communicate can have a big impact on surgical risk.

Even though they might say "natural" or "herbal" on the bottle, commonly used herbal remedies such as ginkgo biloba, ginseng, garlic, or echinacea can be dangerous when used in the days before surgery, plastic surgeon David J Rowe, MD, writes in the latest issue of the Aesthetic Surgery Journal. 

Yet studies suggest as many as 70% of patients don't tell their doctors they are taking herbal supplements, he tells WebMD.

"There are a lot of reasons for this," he says. "Patients may think their doctors don't know anything about herbal supplements or they might believe their doctors will consider the use of these products 'quack' therapy."

It is important that patients tell their doctors about all the medications they are taking, including herbal supplements, before surgery. And doctors should provide patients with a list of supplements to avoid, Rowe says.

In a survey of plastic surgery patients published in February 2006, 55% reported taking at least one herbal supplement on a daily basis.

The most popular herbal remedies were the joint supplements chondroitin and glucosamine; the banned stimulant ephedra; and the cold remedy echinacea.

Surgery Risks of Herbal Supplements

In his newly published analysis, Rowe lists the herbal supplements that he tells patients to stop taking two weeks before surgery.

Supplements that are known or suspected to increase bleeding risk include:

  • Gingko biloba
  • Garlic
  • Ginseng
  • Fish oil
  • Dong quai
  • Feverfew

Supplements associated with cardiovascular risk include:

  • Ephedra
  • Garlic

Supplements with sedating effects that may prolong the effects of anesthesia include:

  • Kava
  • St. John's wort
  • Valerian root

Supplements can also interact with other drugs. Rowe includes a list of some herbal medications that pose such a risk:

  • Licorice
  • St John's wort
  • Kava
  • Valerian
  • Echinacea
  • Goldenseal

In addition, St. John's wort and dong quai increase photosensitivity, which can be especially problematic for patients having laser skin procedures, Rowe says.

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