Uncariae tomentosae radix

Uncariae tomentosae radix, also known as cat's claw root, is a drug used in herbal medicines as an adjuvant therapy for rheumatoid arthritis . In Peru, it is also used as an adjuvant therapy for brain tumors, leukemia and AIDS.

Uncariae tomentosae radix contains 6 stereoisomeric pentacyclic (e.g. pteropodine, mitraphylline) and 4 tetracyclic oxindole-akaloids (up to 2 %). Further ingredients are quinoa acid derivatives, ursolic and oleanolic acid derivatives, phytosteroids (beta-sitosterol, sigmasterol), flavonoids, catechin tannins and procyanidins.

Uncariae tomentosae radix is used for rheumatoid arthritis, rheumatism and for stomach ulcers. In Peru it is also used as adjuvant therapy for brain tumours, leukaemia and AIDS.

3 x daily 20 mg of a dry extract, for tea preparations 3 to 4 x daily 1 tablespoon.

It can lead to constipation, increased uric acid levels and cardiovascular problems.

Based on the available studies and experience reports, no statement can be made about contraindications.

Uncaria tomentosa should not be confused with Uncaria guianensis.
Cat's claw products offered on the Internet should also be considered carefully. Many of these therapeutic promises lack any scientific basis.

1. Schilcher H (2016) Leitfaden Phytotherapie, Urban & Fischer Verlag (2016) Munich, S. 181 f.