Can drinking traditional Chinese medicine cause menstrual delay?

In general, whether taking traditional Chinese medicine (TCM) can cause menstrual delay depends on the specific properties of the herbs used. If the TCM contains ingredients that affect the body's hormone levels, it may lead to delayed menstruation. Conversely, if the TCM does not contain such ingredients, it may not cause menstrual delay. The detailed analysis is as follows:

If the TCM contains components that influence hormonal levels—such as Salvia miltiorrhiza (Danshen) or Bupleurum (Chaihu)—these may interfere with ovarian secretion of estrogen and progesterone, thereby affecting the menstrual cycle. Additionally, some TCM formulations may include blood-cooling and hemostatic ingredients, such as Sanguisorba officinalis (Diyu), Sophora japonica (Huaihua), or Cirsium japonicum (Daji), which could also contribute to menstrual delay.

If the TCM does not contain ingredients affecting hormonal levels—such as Glycyrrhiza uralensis (Gancao)—it is less likely to cause menstrual delay. Moreover, if the patient’s constitution is compatible with the nature of the prescribed herbs and the medication is appropriately administered, menstrual delay usually does not occur.

To avoid potential risks, it is recommended to consult a qualified TCM practitioner before taking any herbal medicine, especially when treating menstrual issues. This ensures that the herbal formula suits the individual’s constitution and health condition, and treatment should always follow professional medical advice.