Taking mifepristone will stomach pain, generally considered to be caused by drug factors or uterine contractions. 1. drug factors: mifepristone is a kind of early pregnancy termination drugs, used for anti-early pregnancy, urge menstruation to stop pregnancy and fetal death in the uterus induced labor, the more common adverse reactions, mainly nausea, vomiting, dizziness and abdominal pain. So, the abdominal pain induced during taking mifepristone is generally considered to be caused by the side effects of the drug. 2. Uterine contraction: Mifepristone will lead to uterine contraction, resulting in spasms, which in turn cause abdominal pain, if the abdominal pain is intolerable, can be relieved by taking painkillers, such as aspirin and ibuprofen, etc., the specifics of the need to comply with medical advice. In addition, the application of mifepristone has certain risks, need to be taken under the guidance of a doctor.