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Vitex Dosage

Because vitex is an herbal supplement (and not a prescription or non-prescription drug), there is little information about a safe and effective dosage. Also, it would be difficult to make consistent and effective dosing guidelines for vitex, as there may be significant variability of the content, purity, and strength among different brands of the same herbal supplement.

An Introduction to Vitex Dosing

As is the case with natural products and herbal supplements, there is no clearly established safe and effective dosage for vitex (chasteberry) at this time. As a result, much of the available information for dosing vitex comes from small clinical studies or from practical experience with the supplement.

Reasonable Dosage of Vitex

There are a few different reasons why it is difficult to recommend a vitex dosage. Unlike for prescription or non-prescription drugs, there is no standard recommended dose for herbal supplements, such as vitex. Additionally, there may be significant variability of the content, purity, and strength among different brands of the same herbal supplement, making consistently safe and effective dosing difficult.
A wide range of vitex dosages have been used, from as low as 1.6 mg up to as high as 1800 mg daily. It is important to note that vitex seems to have drastically different effects on hormones at different dosages. Lower dosages seem to increase prolactin levels, while higher dosages seem to decrease prolactin levels.
Because there is little high-quality information about dosing with vitex, and because there may be significant variability in the active component content among various vitex products, it is probably a good idea to follow the instructions on the label of your vitex product.

General Dosing Information

Some considerations for people taking vitex include:
  • If you decide to take a vitex supplement, it is important to choose a trustworthy manufacturer (as supplements are not regulated as closely as drugs). Your pharmacist is a good source for information about which supplement manufacturers are the most reliable.
  • If you have any chronic health problems or take any prescription medications, it is probably a good idea to check with your healthcare provider before taking vitex.
  • If you are unsure about anything related to your dosage or vitex dosing in general, please talk with your healthcare provider.
Last reviewed by: Kristi Monson, PharmD
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