Uncaria tomentosa (cat's claw) improves quality of life in patients with advanced solid tumors.

Objective: Cat's claw (Uncaria tomentosa) is a native Amazon plant that exhibits anti-inflammatory and antitumor properties. We wanted to assess its activity for symptom management of terminal cancer patients.

Methods: This prospective phase II study assessed the effects of a 100-mg dose of a dry extract of U.