What replacement for the Posiforlid eye mask can be purchased at the pharmacy?

Posifordil has no substitute. In drugstores or online auctions there are masks with a similar effect, but they do not heat up on their own and it is difficult to determine the temperature to which such a mask can be heated - therefore, in my opinion, this is not a safe solution and you will not get a similar effect. Perhaps the solution to the problems with the availability of the mask could be compresses from the herb of the firefly, e.g. https://www.gdziepolek.pl/produkty/85847/zielnik-apteczny-swietlik-fix-ziele/apteki The infusion should be brewed under cover, then slightly cooled, soaked in a cotton swab and make compresses. You can also directly apply a cooled, squeezed sachet. An alternative are also gels based on a firefly, e.g. https://www.gdziepolek.pl/produkty/70548/flos-lekzel-ze-swietlikiem-do-powiek-i-pod-oczy-zel/apteki https://www.gdziepolek.pl/produkty/70549/flos-lek-zel-ze-swietlikiem-i-aloesem-do-powiek-i-pod-oczy-zel/apteki