Potential for interaction of kava and St. John's wort with drugs

Discussion in 'Kava-Kava' started by Bajeda, May 13, 2007.

  1. Bajeda

    Bajeda Super Moderator Platinum Member & Advisor

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    A new entry has been added to Drugs Archive

    Description: The present interest and widespread use of herbal remedies has created the possibility of interaction between them and pharmaceutical drugs if they are used simultaneously. Before the recent reports of apparent hepatotoxicity associated with its use, kava (Piper methysticum Forst. F.), was one of the top 10 selling herbal remedies in Europe and North America. This adverse effect was not previously encountered with the traditional beverage which was prepared as a water infusion in contrast to the commercial products which are extracted with organic solvents. Kavalactones, the active principles in kava, are potent inhibitors of several of the CYP 450 enzymes, suggesting a high potential for causing pharmacokinetic interactions with drugs and other herbs which are metabolized by the same CYP 450 enzymes.

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