Yutin need to eat on an empty stomach, Yutin is a contraceptive pill, before and after taking the contraceptive pill 2 hours can not eat, because the contraceptive pill is easy to cause nausea, vomiting and other symptoms, if you eat will aggravate nausea, vomiting symptoms. If you eat the drug after vomiting will reduce the effectiveness of the drug can not play a contraceptive effect, Yutting need to be taken within 1-3 days after sex, not more than 72 hours, otherwise it can not play a contraceptive effect. Note that taking Yutin is after sex, the sooner you take it, the better the contraceptive effect, it is best to take it according to the instructions or under the guidance of a doctor, so as not to take it improperly to avoid the contraceptive effect. After taking the pill will appear retreat bleeding is a normal phenomenon, do not worry, it is best to pay attention to observation to see the amount of bleeding, if the bleeding is too much need to take medication to stop bleeding, so as not to cause anemia.