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Devil’s Claw: Effective in OA


In a study conducted in France, powdered Harpagophytum procumbens (devil’s claw; Harpadol) proved effective in patients with osteoarthritis (OA) of the knee and hip. In addition, it produced significantly fewer adverse effects than did a European anthraquinone derivative, diacerhein, that is thought to slow the destructive processes of OA.


Chantre P et al. Efficacy and tolerance of Harpagophytum procumbens versus diacerhein in treatment of osteoarthritis. Phytomedicine. 2000;7:177–83.