Washing down Pylera with mineral water does not affect its effectiveness. The effect of the drug has been preserved and there is no cause for concern. During treatment with Pylera, however, you should avoid taking dairy products, more here: https://www.gdziepolek.pl/opinie-i-pytania/16180/tetracyclinum-jak-spozywanie-mleka-i-produktow-mlecznych-wplywa-na-skutecznosc-leku-pylera Here you can check the availability of Pylera in pharmacies and make a reservation: https://www.gdziepolek.pl/produkty/65474/pylera-kapsulki/apteki I also attach links to helpful entries: https://www.gdziepolek.pl/kategorie/leki-na-helicobacter-pylori https://www.gdziepolek.pl/artykuly/jak-laczyc-leki-z-jedzeniem