Some of the black cohosh (Actaea racemosa, Cimicifuga racemosa) side effects that may occur include headaches, dizziness, and weight gain. Although many side effects of black cohosh are merely bothersome, serious side effects are also possible. If you develop signs of liver damage or any signs of an allergic reaction, you should notify your healthcare provider right away.
(Click Black Cohosh Side Effects for more information on possible black cohosh side effects, including the side effects that may require immediate medical attention.)