Mifepristone is a kind of oral abortion drug, fasting within 2 hours after oral intake, so as not to affect the drug absorption. After eating mifepristone for half an hour, if the amount of vomit is large, the vomit will contain mifepristone, which will affect the effect of the drug, and need to be supplemented; if the amount of vomit is very small, it will have little effect. 1. Large amount of vomiting: after a large amount of vomiting, the drug in the stomach will be excreted with the vomit, so the concentration of the drug in the body will be reduced, affecting the effect of the drug, need to be taken under the guidance of the doctor. 2. Smaller amount of vomiting: when a small amount of vomiting, the effect on the concentration of the drug in the body is not significant, you can temporarily observe closely, if the vomiting continues to worsen, it is recommended to consult a doctor immediately. Adverse reactions include nausea and vomiting. It is contraindicated for those who are allergic to the drug and those with ectopic pregnancy. Mifepristone should be used correctly under the guidance of a doctor, do not use the drug on your own to avoid adverse effects.