There are certain side effects of taking the emergency contraceptive pill, including: 1. vaginal bleeding can occur after taking the pill orally, if the bleeding is excessive and exceeds the normal menstrual volume, emergency gynecological consultation is needed. 2. general discomfort, including mild dizziness, headache and nausea, vomiting, can recover on its own. 3. affects the menstrual cycle, can cause early or late menstruation, resulting in menstrual cycle disorders. 4. 4. The emergency contraceptive pill is not 100% safe and effective and there may be a risk of contraceptive failure. 5. It is not recommended to use it more than 2 times a year due to drug damage. In order to avoid the use of emergency contraceptive pills, it is recommended to arrange contraceptive measures during sex to avoid unintended pregnancy, which can cause psychosomatic discomfort.