Update on natural product--drug interactions.

Am J Health Syst Pharm

Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, USA.

Published: February 2002

AI Article Synopsis

  • Interactions between natural products and drugs follow similar pharmacokinetic and pharmacodynamic principles as drug-drug interactions, often affecting drug metabolism, liver, or kidney function.
  • Various natural products like coenzyme Q10, St. John's wort, and ginseng have been shown to interact with medications, but further research is needed to fully understand these interactions.
  • Pharmacists should be knowledgeable about common natural products and consult reliable sources for information, as they play a crucial role in advising patients on potential interactions.

Article Abstract

The interactions of natural products with drugs are discussed. Interactions between natural products and drugs are based on the same pharmacokinetic and pharmacodynamic principles as drug-drug interactions. Clinically important interactions appear to involve effects on drug metabolism via cytochrome P-450 isoenzymes, impairment of hepatic or renal function, and other possible mechanisms. Natural products that have been reported to interact with drugs in humans include coenzyme Q10, dong quai, ephedra, Ginkgo biloba, ginseng, glucosamine sulfate, ipriflavone, melatonin, and St. John's wort. In many cases, more research is needed to confirm these interactions and to determine whether other natural products may also interact with drugs. To effectively counsel patients about interactions involving natural products, pharmacists should be familiar with the most commonly used products and have access to information on more obscure products. In view of the less than stringent provisions of the Dietary Supplement Health and Education Act, pharmacists should consult reliable, independent sources of information on natural products rather than rely on literature provided by manufacturers. Pharmacists should recommend only those products that are manufactured to high quality-control standards. Natural products can interact with drugs and with other natural products by the same mechanisms as drugs.

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Source
http://dx.doi.org/10.1093/ajhp/59.4.339DOI Listing

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