Found a two-letter imprint with no box. Before I guess, here is everything I can see.

Genuine cartons have print that aligns to the die cut. Copies drift by a millimetre or so.

The same imprint exists in several markets for different products, so country matters more than the database.

Foil thickness and seal pattern are where counterfeit blisters fail.

Reagent tests are a screen, not an assay. They rule a family in or out and say nothing about dose.

Would rather not guess, which is why I am asking.