There are two main types of emergency contraception. One is mifepristone tablets, the trade name of which is fennel. Its advantage is that only one tablet is needed within 72 hours after sexual intercourse, and the contraceptive effect is over 99%. Low-dose mifepristone is a new drug for emergency contraception approved by National Medical Products Administration in the early 20th century. The other is levonorgestrel tablets, the trade names of which are "Yuting" and "An Ting". It is characterized by taking two tablets within 72 hours after sexual intercourse, with an interval of 12 hours, and the contraceptive effect is more than 98% earlier. It was used for emergency contraception in the 1990s.
I think what you should say is Vernell.
These drugs are harmful to women, so it is recommended to use them sparingly.