HERBAL THERAPIES:
CAT'S CLAW

This article provides basic information about the herb cat's claw — common names, uses, potential side effects and resources for more information. Cat's claw grows wild in many countries of Central and South America, especially in the Amazon rainforest.

Common Names — cat's claw, una de gato

Latin Names — Uncaria tomentosa, Uncaria guianensis

What It Is Used For

· Cat's claw has been used for centuries in South America to prevent and treat disease.

· It has been used for a variety of health conditions, including viral infections (such as herpes and HIV), Alzheimer's disease, cancer and arthritis.

· Cat's claw has been used to support the immune system and promote kidney health, as well as to prevent and abort pregnancy.

How It Is Used

· The inner bark of cat's claw is used to make liquid extracts, capsules and teas. Preparations of cat's claw also can be applied to the skin.

What the Science Says

· There is not enough scientific evidence to determine how well cat's claw works for any health problem, including arthritis, HIV or cancer.

· Small studies in humans have shown a possible benefit of cat's claw in osteoarthritis and rheumatoid arthritis, but no large trials have been done. In laboratory studies, cat's claw stimulates part of the immune system, but it has not been proven to reduce inflammation or boost the immune system in humans.

· The National Institute on Aging, a part of the National Institutes of Health, is studying how cat's claw may affect the brain. Findings may point to new avenues for research in Alzheimer's disease treatment.

Side Effects and Cautions

· Few side effects have been reported for cat's claw when it is taken at recommended dosages. Although rare, side effects may include headaches, dizziness and vomiting.

· Women who are pregnant or trying to become pregnant should avoid using cat's claw because of its past use for preventing and aborting pregnancy.

· Because cat's claw may stimulate the immune system, it is unclear whether the herb is safe for people with conditions affecting the immune system.

· Tell your health care providers about any complementary and alternative practices you use. Give them a full picture of what you do to manage your health. This will help ensure coordinated and safe care.