Last update Dec. 31, 2018

Uncaria tomentosa

Low Risk

Possibly safe. Probably compatible. Mild risk possible. Follow up recommended. Read the Comment.

Climbing plant which is native from Peru.
It is mainly used the bark of branches, leaves and roots as well.
It contains oxindole alkaloids, steroids, ursolic acid and polyphenols, among other components.
Commonly used as anti-inflammatory on arthritis, rheumatism and gastric ulcer. These anti-inflammatory, immunomodulatory, antioxidant and anti-infective properties are being studied. The degree of evidence available is not as high because of poor quality of the studies performed.

At latest update relevant published data on its excretion into breast milk were not found.

This plant is lacking of toxicity. Given to this, occasional and moderate consumption during lactation would have little or no risk, when used at a correct dose.

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Uncaria tomentosa is Cat´s Claw in Latin, botanical name.

Is written in other languages:

Uncaria tomentosa is also known as


Uncaria tomentosa belongs to this group or family:


Main tradenames from several countries containing Uncaria tomentosa in its composition:


  1. Lock O, Perez E, Villar M, Flores D, Rojas R. Bioactive Compounds from Plants Used in Peruvian Traditional Medicine. Nat Prod Commun. 2016 Mar;11(3):315-37. Review. Abstract Full text (link to original source)
  2. Jalloh MA, Gregory PJ, Hein D, Risoldi Cochrane Z, Rodriguez A. Dietary supplement interactions with antiretrovirals: a systematic review. Int J STD AIDS. 2016 Abstract
  3. Froeling FE, Stebbing J. Uncaria tomentosa, the cat's whiskers or claws? Lancet Oncol. 2014 Abstract
  4. EMA. Assessment report on Uncaria tomentosa. Committee on Herbal Medicinal Products (HMPC). 2014 Full text (in our servers)
  5. López Galera RM, Ribera Pascuet E, Esteban Mur JI, Montoro Ronsano JB, Juárez Giménez JC. Interaction between cat's claw and protease inhibitors atazanavir, ritonavir and saquinavir. Eur J Clin Pharmacol. 2008 Abstract
  6. WHO. World Health Organization. Geneva. WHO monographs on selected medicinal plants. Volume 3. WHO monographs. 2007 Full text (link to original source) Full text (in our servers)
  7. Valerio LG Jr, Gonzales GF. Toxicological aspects of the South American herbs cat's claw (Uncaria tomentosa) and Maca (Lepidium meyenii) : a critical synopsis. Toxicol Rev. 2005 Abstract

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