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Black cohosh Side Effects

Applies to black cohosh: oral tablet

Get emergency medical help if you have any of these signs of an allergic reaction while taking black cohosh: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Although not all side effects are known, black cohosh is thought to be possibly safe when taken for a short period of time (up to 1 year).

Black cohosh can harm your liver. Stop using this product and call your doctor at once if you have signs of liver problems, such as:

  • nausea, loss of appetite, upper stomach pain;

  • itching, tired feeling;

  • dark urine, clay-colored stools; or

  • jaundice (yellowing of the skin or eyes).

Common side effects may include:

  • stomach pain or upset;

  • heavy feeling;

  • vaginal bleeding or spotting;

  • headache;

  • rash; or

  • weight gain.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

Some side effects of black cohosh may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

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