Emergency contraceptive pills should not be taken more than three times in a year, and the number of times depends on your own situation. The emergency contraceptive pill is mainly used to prevent pregnancy after unprotected intercourse and contains a large amount of progesterone and estrogen in its composition. It can cause irregular vaginal bleeding, damage to the endometrium, endocrine disorders, and menstrual disorders. If emergency contraceptives are used for a long time, it may affect the function of the ovaries and even cause infertility. Therefore, it is generally not recommended to use the emergency contraceptive pill for contraception unless it is particularly urgent. There are other safer contraceptive methods such as condoms and IUDs that can be used to prevent pregnancy. It should also be noted that after using the emergency contraceptive pill, unprotected intercourse should be avoided, as the emergency contraceptive pill can only have a contraceptive effect on the previous sexual intercourse.