The C.A.M. Report
Complementary and Alternative Medicine: Fair, Balanced, and to the Point
  • About this web log

    This blog is intended as an objective and dispassionate source of information on the latest CAM research. Since my background is in pharmacy and allopathic medicine, I view all CAM as advancing through the development pipeline to eventually become integrated into mainstream medical practice. Some will succeed while others fail. But all are treated fairly here.

  • About the author

    John Russo, Jr., PharmD, is president of The MedCom Resource, Inc. Previously, he was senior vice president of medical communications at www.Vicus.com, a complementary and alternative medicine website.

  • Common sense considerations

    The material on this weblog is for informational purposes. It is not medical advice or counsel. Be smart, consult your health professional before using CAM.

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  • Recent Comments

    No interaction between goldenseal or kava kava and digoxin

    This seems to be the first time the potential for these interactions has been studied.

    Here are the details.

    • 20 volunteers were assigned to 14 days of goldenseal root extract (1,323 mg, 3 times daily, standardized to 24.1 mg isoquinoline alkaloids per capsule) and kava kava rhizome extract (1,227 mg, 3 times daily, standardized to 75 mg kavalactones per capsule).
    • Digoxin (Lanoxin) 0.5 mg was administered by mouth before and at the end of goldenseal and kava kava treatment and the control period.
    • Digoxin blood levels were drawn and pharmacokinetic calculations were performed.

    Goldenseal caused a 14% increase in the peak blood levels of digoxin. But none of the other calculations showed any change in digoxin blood levels by goldenseal or kava kava.

    It seems to me that a 14% increase in digoxin blood levels, considering its narrow therapeutic range, might have a significant effect in some patients. Nevertheless, the researchers concluded, “supplementation with these specific formulations of goldenseal or kava kava did not appear to affect digoxin pharmacokinetics.”

    3/24/07 19:56 JR

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