How does Vitex Agnus-castus work?

Vitex agnus-castus seems to affect many hormones that regulate women's reproductive cycles.

Are there safety concerns?

Vitex agnus-castus seems to be safe for most people. Uncommon side effects include upset stomach, nausea, itching, rash, headaches, acne, trouble sleeping, and weight gain. Some women notice a change in menstrual flow when they start taking vitex agnus-castus.

Do not take vitex agnus-castus if:
  • You are pregnant or breast-feeding.
  • You have a hormone-sensitive condition such as endometriosis; uterine fibroids; or cancer of the breast, uterus, or ovaries.
  • You are trying to get pregnant using in-vitro fertilization.

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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.