Related Experiment Video
Updated: May 2, 2026

Chinese Herbal Retention Enema for the Treatment of Ulcerative Colitis
Published on: May 16, 2025
Abstract:
Harpagophytum procumbens, or devil's claw, is an African plant whose root is used to relieve minor joint symptoms. Several cases of gastrointestinal bleeding associated with the use of devil's claw root have been reported. A systematic review of the adverse effects of devil's claw root in about 20 randomised, double-blind, placebo-controlled clinical trials showed mainly gastrointestinal effects: gastralgia and dyspepsia. In practice, devil's claw root exposes patients to the risk of sometimes serious upper gastrointestinal disorders, yet has no established efficacy beyond a placebo effect. It is best avoided.
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