Current drug metabolism
-
Current drug metabolism · Jan 2014
ReviewPharmacokinetic interactions between herbal medicines and prescribed drugs: focus on drug metabolic enzymes and transporters.
Herbal medicines have been widely used for thousands of years, and now are gaining continued popularity worldwide as a complementary or alternative treatment for a variety of diseases, rehabilitation and health care. Since herbal medicines contain more than one pharmacologically active ingredient and are commonly used with many prescribed drugs, there are potential herb-drug interactions. A variety of reported herb-drug interactions are of pharmacokinetic origin, arising from the effects of herbal medicines on metabolic enzymes and/or transporters. ⋯ This review summarizes the mechanism underlying herb-drug interactions and the approaches to identify the interactions, and discusses pharmacokinetic interactions of eight widely used herbal medicines (Ginkgo biloba, ginseng, garlic, black cohosh, Echinacea, milk thistle, kava, and St. John's wort) with conventional drugs, using various in vitro, animal in vivo, and clinical studies. The increasing understanding of pharmacokinetic herb-drug interactions will make health care professionals and patients pay more attention to the potential interactions.