Researchers from the Cheyenne Veterans Affairs Medical Center, in Wyoming report that when taken together, 1 patient experienced bleeding from the blood “thinner” warfarin (Coumadin). (more…)

Cytochrome P450 2D6 (CYP2D6) is a liver enzyme responsible for the metabolism of approximately 30% of all drugs.

Researchers at the University of Arkansas for Medical Sciences in Little Rock studied the effect of CYP2D6 on the metabolism of several herbal supplements and the risk of drug interactions. (more…)

Researchers from the Russian Academy of Natural Sciences, in Moscow report that time-released tablets (Allicor) are more effective than regular garlic supplements (Kwai). (more…)

Shengmai-yin (Sheng Mai Yin Pian) is a concentrated Chinese herbal medicine used to “treat a deficiency of vital energy and Yin, palpitation and shortness of breath, faint pulse, and spontaneous perspiration,” according to ActiveHerb.com.

Researchers at Zhejiang University, in Hangzhou, China report a patient who appeared to suffer from an interaction with warfarin (Coumadin). (more…)

The U.S. Government Accountability Office (GAO) presented to congress the results of a “secret shopper” investigation, which found that in some stores, salespeople made inappropriate or illegal claims about dietary supplements.

What to do? (more…)

Researchers from the Mayo Clinic, in Rochester, Minnesota have listed drugs to avoid when taking tamoxifen (Nolvadex) to treat breast cancer, but they omit reference to herbal supplements.

A study from the University of Arkansas helps correct their oversight. (more…)

It’s a long list compiled by researchers at RMIT University in Victoria, Australia. (more…)

Researchers at Central South University, in Hunan, China studied the effect of curcumin (turmeric) on drug metabolizing enzymes.

Their findings suggest a risk for curcumin-drug interactions. (more…)

Thanks to a barrage of recent studies and conflicting media messages, consumers are confused about the benefits (if any) from vitamin E supplements.

Until all this is sorted out, remember, high doses of vitamin E increase the risk of bleeding.

Here’s what we know about that. (more…)

Researchers from Georgetown University in Washington, DC report that when taken short term, Echinacea purpurea products (roots and/or aerial parts) do not appear to be a risk to consumers. (more…)