(1) Mugwort leaves recorded in the Chinese Pharmacopoeia: pungent, bitter, warm; slightly toxic. Warm menstruation to stop bleeding, dispel cold and relieve pain. (2) Motherwort: bitter, pungent, slightly cold. Promotes blood circulation and regulates menstruation, diuresis and swelling, clearing away heat and detoxifying. (3) Moongrass is not included.

Classical records: (1) Mugwort leaves: pungent, bitter, warm; slightly poisonous. Regulates qi and blood, drives away cold and dampness; warms menstruation, stops bleeding, and relieves miscarriage. (2) Motherwort: hard, cool. Promotes blood circulation, removes blood stasis, regulates menstruation, and eliminates water. (3) Moon grass: According to the information reviewed, it is a local medicine. Moreover, there are different Chinese medicines nicknamed "Daiyuecao" in various places, including Xu Changqing, Chicai (Yurongcao), Forsythia suspensa, Ironhorn Fernweed, Yuanbaocao, etc. Among them, the main functions of Yuanbaocao are "cooling blood and stopping bleeding; clearing heat and detoxifying; activating blood circulation and regulating menstruation; dispersing wind and dredging meridians". It has similar effects to Motherwort in treating irregular menstruation.

Looking at your question, the motherwort and moxa leaves used are related to regulating menstruation and analgesic. It is speculated that the "yuecao" in the prescription may also have this intention. Then you must pay attention to using the correct "Moon Grass", because some other "Moon Grass" are not the same as Yuanbao Grass.

Here, let’s assume that the “Moon Grass” in your recipe is Yuanbao Grass.

The properties of Yuanbaocao and Motherwort are cold and cool, while mugwort (the leaves are used as medicine) is warm in nature. From the perspective of traditional Chinese medicine, moxa leaves are mainly used to treat cold syndrome, such as cold pain in the lower abdomen, irregular menstruation, cold uterus and infertility. Yuanbaocao and motherwort mainly treat heat syndrome and are used for irregular menstruation, dysmenorrhea, amenorrhea, and persistent lochia. Motherwort ointment is a commonly used prescription in obstetrics and gynecology clinics to regulate menstruation and eliminate lochia after childbirth.

No literature has been found on the use of Yuanbaocao, Motherwort and Mugwort in the same prescription, nor on any literature or reports on toxic reactions, adverse reactions or medical accidents caused by the simultaneous use of these three traditional Chinese medicines.

If you use the above prescription to treat irregular menstruation, you need to identify the cold and heat of the disease and use different medications. It is best to ask a traditional Chinese medicine doctor to diagnose and use the medicine according to the doctor's prescription. Under normal circumstances, if you have heavy menstrual flow, it is not recommended to use motherwort, because motherwort has the effect of activating blood circulation and removing blood stasis, which will increase the amount of bleeding; if your menstrual flow is light or painful, applying a hot water bottle to the lower abdomen can relieve the pain, which is For cold syndrome, moxa leaves can be used to regulate menstruation; if menstrual flow is light and there are blood clots, it is blood stasis, motherwort can be used to activate blood circulation and remove blood stasis to regulate menstruation. When women are postpartum, their bodies are weak, and their conditions are complicated, in some cases, using the above three traditional Chinese medicines may also be an option.

Note: The above analysis is purely based on the author’s professional knowledge of traditional Chinese medicine. It is recommended that the questioner delay medical treatment and ask a traditional Chinese medicine doctor to diagnose the specific condition before making a decision.