No, the ingredients of Gebetil ointment do not affect the effectiveness of Vibin mini contraceptive pills, these drugs can be combined and protection will be preserved.

Betamethasone and gentamicin contained in the ointment have a local effect (on the skin) and are absorbed into the general circulation to a very small extent. Therefore, there is no risk of the ointment interacting with medications taken orally.

Here you can check the availability of these medicines in pharmacies and make a reservation:

https://www.gdziepolek.pl/produkty/117929/gebetil-masc/apteki

https://www.gdziepolek.pl/produkty/82281/vibin-mini-tabletki-powlekane/apteki

I'm attaching a link to a helpful post:

https://www.gdziepolek.pl/artykuly/jakie-leki-oslabiaja-skutecznosc-antykoncepcji