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Update on natural product--drug interactions
Gayle Nicholas Scott1, Gary W Elmer
1Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, USA. gscottphar@aol.com
Summary
Natural products can interact with drugs through pharmacokinetic and pharmacodynamic mechanisms, similar to drug-drug interactions. Pharmacists must be knowledgeable about these interactions to ensure patient safety.
Area of Science:
- Pharmacology
- Natural Products Research
- Drug Interactions
Background:
- Natural products are widely used alongside conventional drugs.
- Understanding potential interactions is crucial for patient safety.
- Existing knowledge on natural product-drug interactions is evolving.
Purpose of the Study:
- To discuss the principles and mechanisms of natural product-drug interactions.
- To highlight common natural products known to interact with drugs.
- To emphasize the role of pharmacists in managing these interactions.
Main Methods:
- Review of existing literature on natural product-drug interactions.
- Analysis of pharmacokinetic and pharmacodynamic principles governing these interactions.
- Identification of specific natural products with reported interactions.
Main Results:
- Natural product-drug interactions share mechanisms with drug-drug interactions, including effects on drug metabolism (e.g., cytochrome P-450) and organ function.
- Several natural products, such as St. John's wort, Ginkgo biloba, and ginseng, have documented interactions.
- More research is needed to confirm interactions and identify other potential culprits.
Conclusions:
- Pharmacists play a vital role in counseling patients on natural product-drug interactions.
- Reliable, independent information sources are essential for accurate guidance.
- Emphasis on high-quality manufacturing standards for natural products is recommended.