Cat's claw is widely used in the United States and Europe and it is one of the top herbal remedies sold despite a lack of high-quality human evidence. In Germany and Austria, cat's claw is only available by prescription. Several laboratory and animal studies suggest that cat's claw may reduce inflammation; this has led to research of cat's claw for inflammatory conditions, such as arthritis. Early research also suggests that cat's claw may reduce pain from knee osteoarthritis. Large, high-quality human studies are needed comparing effects of cat's claw alone vs. placebo before a conclusion can be drawn.
Avoid if allergic to cat's claw, Uncaria plants, or plants in the Rubiaceae family (such as gardenia, coffee, or quinine). Avoid with a history of conditions affecting the immune system (such as AIDS, HIV, some types of cancer, multiple sclerosis, tuberculosis, or lupus). Use cautiously with bleeding disorders or with a history of stroke. Use cautiously if taking drugs that may increase the risk of bleeding. Stop use two weeks before and immediately after surgery/dental/diagnostic procedures with bleeding risk. Avoid if pregnant or breastfeeding. Cat's claw may be contaminated with other Uncaria species. Reports exist of the potentially toxic Texan grown plant Acacia gregii being substituted for cat's claw.
Copyright 2007 Natural Standard, Inc.
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