You cannot take emergency contraceptive pills during breastfeeding because they are hormonal drugs and taking such hormonal drugs during breastfeeding can cause nausea, vomiting and other gastrointestinal reactions. Poor appetite during breastfeeding can affect the quality of milk, and can easily cause a decrease in the amount of protein, vitamins and trace elements in the milk, which can easily cause malnutrition in the baby, resulting in small development of the baby, etc. These hormonal drugs can enter the baby’s body through breast milk, which can also have adverse effects on development, causing precocious sexual maturity, such as breast development in male babies and labial hypertrophy in female babies. Due to this hormonal drug influence can cause endocrine changes in the body, which can easily cause a decrease in milk, etc. You need to take other contraceptive methods during breastfeeding, for example, you can use contraceptive methods such as contraceptive rings and condoms, which are safer, and it is better not to take contraceptive pills.