When do OC-35 tablets start to work?

According to the information contained in the Summary of Product Characteristics, if you start taking the product for the first time on the first day of menstruation, this provides protection against unwanted pregnancy already in the first cycle of treatment. When taking the first tablet on the 5th day of the cycle, you should use an additional method of contraception throughout the first cycle or refrain from sexual intercourse. Therefore, if you take the first tablet on the first day of your period, you are protected immediately against pregnancy. At the following link you can book the drug at the pharmacy of your choice in the Polish: https://www.gdziepolek.pl/produkty/55515/oc-35-tabletki-powlekane/apteki