As a medicine, Neobiotics is the abbreviation of Neobiotics Tablets and Neobiotics Granules, and Yimouzhi is the abbreviation of Yimouzhi Granules. Residual drainage refers to the process of promoting the expulsion of blood and residual pregnancy tissue from the uterine cavity after miscarriage or delivery. Both New Biochemistry and Motherwort have residual discharging effects, but the mechanism of action is different, so it is not possible to judge which drug has a better effect on residual discharging. The therapeutic effect of the drug is also directly related to the patient’s symptoms, the severity of the disease and whether the drug is used for the right condition. New Biochemistry is made from a variety of Chinese herbs, while Yimouzuo is a single herb. The main function of Xin Biochem is to invigorate blood stasis and relieve pain, while Yi Mu Cao has the function of invigorating blood and regulating menstruation in addition to resolving blood stasis and relieving pain. Xin Biochem can promote contraction of the uterus to expel stagnant blood, as well as increase the amount of circulating blood in the uterus and promote the recovery of the uterine lining, and can be used as an adjunctive treatment after abortion, childbirth, IUD and IUD removal surgery. Motherwort can be used for patients with low menstrual flow and postpartum abdominal pain to promote the discharge of postpartum dew. However, it should be noted that pregnant women, patients with low Yin deficiency and blood, and women during menstruation should not take Motherwort, as it will aggravate menstrual flow and cause adverse effects on the body. As can be seen, both drugs belong to gynecological use, and both Xin Biochemistry and Yimu Cao have the effect of draining residue, but the specific use of which drug generally depends on the specific symptoms of the patient to choose.