If you miss 3 days of the dose during the course of taking Eusebio, you should make up for the missed dose as soon as it is discovered and continue to take the dose in the same way as before until you finish 21 tablets, but this may lead to pregnancy because the missed dose is relatively long. If you miss a dose for 12 hours, taking it immediately will not affect the effectiveness of the contraceptive, but missing 3 days may cause it to fail. If you have intercourse during the 3 days of missed dose, you can take oral emergency contraceptive pill within 72 hours after intercourse to avoid the consequences of pregnancy, but you should continue to take Eusebio, do not stop taking the pill, until the end of 21 days.