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Cat's Claw Contraindications

Cat's claw was named for the curious, hook-like thorns on this woody vine, the extract of which was used for medicinal purposes dating back to the time of the Inca civilization. Its historic uses encompass numerous, disparate health conditions, such as stomach ulcers, arthritis, fever and dysentery. It was also used as a natural oral contraceptive. Those who use complementary and alternative therapies know that even natural remedies come with contraindications, especially when combined with conventional medications.

  1. Immune System

    • According to the National Center of Complementary and Alternative Medicine (NCCAM), lab tests suggest that cat's claw stimulates the immune system. It's not know if those with disorders of the immune system can safely use it. The University of Maryland Medical Center (UMMC) advises that cat's claw should not be mixed with immunosuppressive medications like cyclosporin or drugs taken after an organ transplant or used to treat autoimmune disease without a doctor's consent.

    Anticoagulants

    • Don't take cat's claw if you also take warfarin or other anticoagulants or blood-thinning medications, advises the Memorial Sloan-Kettering Cancer Center. Combining cat's claw with these drugs may increase the risk for bleeding and bruising.

    Blood Pressure

    • Avoid cat's claw when taking antihypertensive medications or drugs to lower blood pressure. According to the Memorial Sloan-Kettering Cancer Center, cat's claw may enhance the effect of these drugs and lower blood pressure even more.

    Women's Concerns

    • Based on the historic use of cat's claw as a natural oral contraceptive and abortifactant, women who are trying to conceive or who are already pregnant should not use cat's claw. The UMMC also states that cat's claw should not be used with estrogens or progestins, including oral contraceptives, without first consulting with a physician.

    Other Cautions

    • Cat's claw has not been studied in the pediatric population, so it's not recommended for use in children. Keep in mind that cat's claw products are classified as dietary supplements by the U.S. Food & Drug Administration and cannot purport to treat or cure a medical condition. Talk with your doctor before taking cat's claw to address your health concerns.

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