Eusebio is a contraceptive pill and if you want to take it after your period, you should not have sex until 7 days after taking it, and preferably right after your period clears. If taken in the middle of your period, it does not produce a contraceptive effect and can easily lead to contraceptive failure. The proper way to take it should be to start on the 1st day of menstruation and take it for 7 days before you can have contraceptive effect and no contraceptive is needed for sex. If you have sexual intercourse within 7 days of taking the pill, you need to take other methods of contraception, otherwise it will easily lead to the failure of contraception. Because Eusyn contains estrogen and progestin, it must be taken according to medical advice.