Cat's Claw May Stimulate the Immune System

Side Effects and CautionsFew side effects have been reported for cat's claw when it is taken at recommended dosages. Though 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.