Does Biseptol 960 affect the contraceptive efficacy of Sylvie 20 pills?

To @Izabela: Some studies indicate that the effectiveness of oral contraceptives containing oestrogens (e.g. ethinyl estradiol) may be impaired with the simultaneous use of antimicrobials such as ciprofloxacin (the active ingredient in Proxacin). The risk of such an interaction is small, so there is no information about it in the leaflet of the drug, but often, just in case, it is recommended to use additional protection during the treatment and for 7 days after its completion.

Hello, and I wanted to ask about Levonine and Proxacin 500. In no leaflet does not write to see went into reaction, but on the Internet there are so different information and pharmacists write them that Proxacin reduces the effectiveness of Levonine. Same in the interaction search engine. Who to believe? Producer? How is it really? Regards Izabela