No interactions have been observed between the active substances contained in Betaserc (betahistine) and Sirdalud (tizanidine) and NSAIDs (which include Nimesil and Dexak) that could adversely affect the efficacy or safety of treatment. So you can use Nimesil or Dexak for a toothache, as indicated in the leaflet. You can keep a 2-3 hour interval, but it is not necessary.

https://www.gdziepolek.pl/produkty/53354/nimesil-granulat-do-wytworzenia-zawiesiny/apteki

https://www.gdziepolek.pl/produkty/92345/dexak-tabletki-powlekane/apteki

On our website, you can compare the prices of over-the-counter drugs in online pharmacies and place an order with home delivery or collection at the pharmacy. In cities such as Warsaw, Wrocław, Katowice, Kraków, Lublin, Gdańsk, Łódź, Szczecin, Białystok, Poznań and Chorzów, products can be ordered with instant delivery in as little as 1 hour thanks to the Wolt Drive service.

Throughout June, delivery from Wolt Drive is free on orders from 99 PLN - check if the service is available in your location:

https://www.gdziepolek.pl/koszyk/szybka-dostawa?src=zf

Below are some resources that may be useful:

https://www.gdziepolek.pl/artykuly/czy-mozna-laczyc-leki-ze-soba