Theoretically, at the patient's request, it is possible to dispense 60 tablets of a lower dose (100 mg) on the indicated prescription, the total amount of the active substance will be identical to the one prescribed on the prescription. However, this is a modified-release form of the drug, so it would be better to ask the pharmacy to divide the 60-tablet pack at a dose of 200 mg (more https://www.gdziepolek.pl/opinie-i-pytania/125227/mam-taka-oto-recepte-z-ktora-rzeczy-jest-problematyczn-a-mianowi here) or, if this turns out to be problematic, contact your doctor to prescribe a 60-tablet pack at a dose of 200 mg, indicating a problem with the availability of the prescription 30-tablet packaging.

I'm sending a similar question on the forum:

https://www.gdziepolek.pl/opinie-i-pytania/66913/mst-continus-czy-farmaceuta-moze-wydac-mniejsza-dawke-leku-narkotycznego-mst-continus-niz-wypisana-n

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

https://www.gdziepolek.pl/produkty/50519/mst-continus-tabletki-o-zmodyfikowanym-uwalnianiu/apteki

If necessary, the Gdziepolek.pl portal allows you to use teleconsultations:

https://www.gdziepolek.pl/telekonsultacja