It is still useful to take the pill the day after intercourse, because the emergency contraceptive pill is taken orally within 72 hours after intercourse, but it does not achieve 100% contraceptive effect, and the percentage of contraception can be as high as 98% in clinical practice, so about 2% of people may get pregnant even if they take the emergency contraceptive pill. In addition, it is recommended not to use the emergency contraceptive pill as a regular contraceptive method in daily life, because the emergency contraceptive pill is a highly effective progestin, so the side effects are very high, not only causing endocrine disruption, making menstrual disorders and irregular vaginal bleeding, but also possibly causing damage to liver and kidney functions. So it is recommended that if you are not planning to get pregnant, you can use condoms during the whole process of sexual life, which can achieve a very good contraceptive effect, the key is that the contraceptive effect is good and there are no side effects.