Neurovit fast (B vitamins), Dicloberl (a non-steroidal anti-inflammatory drug) and Sirdalud (tizanidine) are not listed as drugs that reduce the effectiveness of oral contraception, including Slinda pills.

If you use Neurovit fast and Dicloberl injections for 5 days and Sirdalud half a tablet for 20 days, there is no indication that additional contraceptive protection is necessary.

It is always a good idea to inform your doctor about all the medications you are taking and observe any changes in your cycle. If in doubt, additional protection can be used for the duration of treatment and one week after treatment.

If you need more personalized advice, you can use teleconsultations here:

https://www.gdziepolek.pl/telekonsultacja/z-ginekologiem

Through Gdziepolek, it is possible to book medicines in a selected pharmacy in Polish:

https://www.gdziepolek.pl/produkty/99853/dicloberl-75-mg-3-ml-iniekcja/apteki

https://www.gdziepolek.pl/produkty/92324/neurovit-fast-iniekcja/apteki

https://www.gdziepolek.pl/produkty/71404/sirdalud-tabletki/apteki

https://www.gdziepolek.pl/produkty/101505/slinda-tabletki-powlekane/apteki

I also encourage you to read materials on similar topics:

https://www.gdziepolek.pl/artykuly/jak-prawidlowo-stosowac-antykoncepcje

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

https://www.gdziepolek.pl/artykuly/czy-jedzenie-i-picie-obnizaja-skutecznosc-antykoncepcji