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Cat's Claw Side Effects, Interactions and Warnings



  • Cat's claw (Uncaria tomentosa and Uncaria guianesis) is a medicinal plant from the Amazon commonly used to treat disorders such as arthritis, gastritis and osteoarthritis. The mechanism of cat's claw appears to be as an inhibitor of TNFalpha and antioxidant. Understanding the processes in osteoarthritis may facilitate and clarify the potential role of cat's claw as a complementary therapy to assist in the reduction of pro-inflammatory mediators and effectors. Use caution if you are using anti-inflammatory medications.
    - Complement Ther Clin Pract. 2007 Feb;13(1):25-8. Epub 2006 Dec 13. -- Cat's claw: an Amazonian vine decreases inflammation in osteoarthritis. -- Hardin SR.

  • Notrecommended for children, women who are pregnant, breastfeeding or are trying to become pregnant.
    - Murray, M. -- The Pill Book Guide to Natural Medicines: Vitamins, Minerals, Nutritional Supplements, Herbs, and Other Natural Products. -- Bantam, 2002. 586.

  • Not recommended for organ transplant recipients, as it may stimulate the immune response and cause a rejection of the organ or tissue.
    - Murray, M. -- The Pill Book Guide to Natural Medicines: Vitamins, Minerals, Nutritional Supplements, Herbs, and Other Natural Products. -- Bantam, 2002. 584-585.








last update: February 2014



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