Four Substance Soup can be consumed before and after menstruation. The specific time and method of consumption need to be chosen by a professional physician after diagnosis and identification. Four Substances Soup is a traditional Chinese medicine formula, which is a blood tonic, composed of white peony, angelica sinensis, radix rehmanniae, and Rhizoma ligustici Chuanxiong. It is effective in tonifying and regulating Blood, and is mainly used for treating symptoms of Blood deficiency and stagnation, such as dizziness, palpitations (rapid heartbeat, often accompanied by panic), insomnia, lack of luster, and irregular menstruation in women with scanty or closed menstruation and menstrual cramps. Four Substances Soup is a basic formula for tonifying and regulating blood, and practitioners use it according to the identification of the symptoms, plus or minus the medication. As Four Substances Tang contains Angelica sinensis and Rhizoma Ligustici Chuanxiong, which are blood-activating medicines, drinking it during menstruation may lead to excessive menstruation, prolonged menstruation, and irregular menstruation, etc. Patients with excessive menstruation or prolonged menstruation should avoid taking this medicine during menstruation.