Specific Safety Warnings and PrecautionsSome warnings and precautions to be aware of concerning the safety of chasteberry include the following:
- Chasteberry can affect hormones, including estrogen and progesterone. It is not clear how chasteberry may affect hormone-sensitive conditions, such as breast cancer, uterine fibroids, or endometriosis. If you have any of these conditions, check with your healthcare provider before taking chasteberry.
- Although chasteberry is often used to treat infertility, do not take chasteberry without checking with your healthcare provider, especially if you are already being treated for infertility. Theoretically, chasteberry might interfere with other infertility treatments.
- Theoretically, chasteberry may interact with a number of medications (see Drug Interactions With Chasteberry).
- As an herbal supplement, chasteberry is not as closely regulated as prescription (or non-prescription) drugs. It can be marketed without any proof that it is either safe or effective. Do not assume that just because a product is sold or advertised in the United States that it is safe or effective. Make sure to look for chasteberry products from a reputable manufacturer. Your pharmacist is a good resource for information about which manufacturers are the most reputable.
- If you have a chronic or severe medical condition, it is always a good idea to check with your healthcare provider before taking any medication or supplement, including chasteberry.
- It is unknown if this supplement is safe for use during pregnancy or breastfeeding (see Vitex and Pregnancy and Vitex and Breastfeeding).