Before painless abortion surgery, patients need to take drugs for cervical softening drugs, including misoprostol tablets, mifepristone tablets, etc., applicable to the larger month of pregnancy, the patient’s age, the preoperative examination found that the cervix is hard, if necessary, with the vaginal medicine. In general, patients with good cervical conditions and small and clearly visible gestational sacs generally do not need to take medication. The purpose of medication before painless abortion is to protect the cervix. The procedure requires the use of dilatation rod to expand the cervical canal, easy to damage the cervical canal, after the application of drugs to increase the elasticity of the cervix, reduce the rate of intraoperative cervical injury. And such drugs have the effect of promoting uterine contraction, which can help the uterus to return to normal, and can continue to be used after the operation. Patients may experience abdominal pain after using the drug, the pain is mild and can be tolerated by the general population, some patients may also experience diarrhea, low fever and other symptoms, usually about 12 hours will disappear, do not need special treatment, pay attention to observation can be. In addition, before using the drug need to clarify their own situation, there is a combination of kidney, liver function abnormalities should be promptly explained to the doctor, the doctor to determine whether the need to use such drugs.