Taking the pill twice in half a month is likely to cause endocrine disorders, menstrual disorders, nausea, vomiting and irregular bleeding. The pill is more damaging to the body, and it is more harmful to take it twice in half a month, and the emergency contraceptive pill should not be taken more than three times in a year. Emergency contraceptive pills are irritating to the gastrointestinal tract and can cause nausea, vomiting and other gastrointestinal effects after a single dose. The main ingredient of emergency contraceptive pill is progestin, and taking a large amount of progestin at one time will easily cause endocrine disorders and menstrual disorders, and also lead to irregular bleeding from the uterus. Women who do not intend to get pregnant are recommended to take condoms, which are safer and more effective, do not affect future conception, and can also avoid some infectious diseases.