Herbs: Toxicities And Drug Interactions (cont.)

Medical Author:

William C. Shiel Jr., MD, FACP, FACR

William C. Shiel Jr., MD, FACP, FACR

Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

View Full Profile

Medical Editor:

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

View Full Profile

Ginger

Uses: Ginger has been used as a treatment for nausea and bowel spasms.

Reactions: Ginger may lead to blood thinning. It is not recommended to be taken with medications that prevent blood clotting (anticoagulants) such as warfarin (Coumadin).

Saw Palmetto

Uses: Saw palmetto has been most commonly used for enlargement of the prostate gland. Saw palmetto has also been touted as a diuretic and urinary antiseptic to prevent bladder infections. However, according to the National Institutes of Health (NIH), there is insufficient scientific evidence to support the use of saw palmetto for treatment of enlarged prostate or any other conditions.

Reactions: Saw palmetto can cause upset stomach. This herb may affect the action of the sex hormone testosterone, thereby reducing sexual drive or performance. Dr. Miller states that "While no drug-herb interactions have been documented to date, it would be prudent to avoid concomitant use with other hormonal therapies (for example, estrogen replacement therapy and oral contraceptives...")

This listing represents only a small portion of herbal treatments. Nevertheless, the popularity of herbal therapies is unquestionable. Doctors routinely confront the unknown with their patients who are using herbs. Doctors simply do not have any way of helping you to decide whether these herbs are helpful or harmful for you, or whether they are interacting with your current medications. There are no data.

References: L. Miller. "Herbal Medicinals." Archives of Internal Medicine 1998;158:2200-2209.

National Institutes of Health, "Saw Palmetto;" March 2008.