Should Leonurus (Yi Mu Cao) be taken before or after menstruation?

Leonurus should be taken after menstruation. Leonurus is a traditional Chinese medicine that helps contract the uterus and reduce bleeding. If menstrual bleeding is excessive, it can be used temporarily to control bleeding and decrease menstrual flow. Generally, Leonurus is taken during the heaviest days of menstruation, but should not be taken before menstruation begins. However, one should not rely solely on Leonurus for excessive menstruation; underlying medical conditions causing heavy periods should be evaluated. It is recommended that patients use this medication under the guidance of a physician.