You should take Eusebio for three months to regulate your period. Eusebio is a short-acting contraceptive pill that is usually used to regulate menstruation. The pill is started on the fifth day of menstrual bleeding and is taken for a total of 21 days, during which time it should be fixed and the pill should not be missed. If the time is staggered too much, or if the pill is missed, vaginal bleeding may occur. After one box, you have to stop taking the medicine and wait for the next menstrual flow. If your period comes, you also have to take the medicine for the next month starting on the fifth day of your period when you see blood, and stop taking the medicine after a total of three months to observe whether your period returns to normal. If it returns to normal, you can stop taking the medicine. If the menstruation becomes irregular again, you have to take the medicine orally for another three months, and the menstruation will be normalized after six months.