Blue Cohosh

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How does Blue Cohosh work?

It is thought that blue cohosh might have effects similar to the hormone estrogen. It also may narrow the vessels that carry blood to the heart that can decrease oxygen in the heart.

Are there safety concerns?

Blue cohosh is not safe for adults or children.

It can cause diarrhea, stomach cramps, chest pain, increased blood pressure, increased blood sugar, and other severe side effects. When taken by the mother late in pregnancy, blue cohosh can cause severe heart problems in the newborn baby.

Do not take blue cohosh if:
  • You are pregnant or breast-feeding.
  • You have heart disease such as angina or high blood pressure.
  • You have diabetes.
  • You have diarrhea.
  • You have breast, uterine, or ovarian cancer.
  • You have endometriosis or uterine fibroids.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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