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Tripterygium is a climbing vine with a long history of use in traditional Chinese herbal medicine . It is used in mixtures intended for the treatment of arthritis, muscle injury, skin diseases, and other problems. The roots, leaves, and flowers are the parts used medicinally.
Tripterygium is thought to be toxic or even fatal if taken to excess. Extracts made with ethyl acetate or chorloroform-methanol came into use in China in the 1970s, and were said to be less toxic. However, the safety of these extracts has not been conclusively established, and we recommend against using tripterygium except in the context of a scientific trial.
In animal, test-tube, and preliminary human trials, trypterygium has shown immunosuppressive and anti-inflammatory affects. 1 2 3 4 5 6 Because drugs with these properties are useful for conditions in which the immune system is overactive, such as rheumatoid arthritis and lupus , trypterygium has been proposed for similar use. However, as yet there is only minimal evidence that it is effective.
One double-blind, placebo-controlled study performed in China in 1997 evaluated the topical use of a tripterygium extract in 61 people with rheumatoid arthritis. 7 The extract was applied 5–6 times daily to the affected joints. The results appeared to indicate that use of the herbal tincture over 6 weeks significantly reduced rheumatoid arthritis symptoms as compared to...
Trypterygium is a toxic herb: various components of trypterygium can cause liver injury, genetic damage, and birth defects. 8 9 10 11 It is thought, but not proven, that certain chemical extracts of trypterygium are safe if used within proper dosage limits. 12 All forms of the herb should be avoided by pregnant or nursing women, young children, and those with kidney or liver disease.