Rx prescriptions are regulated by law and must be issued on paper blanks, but, in real life,
just only 3-5% of all medications
were prescribed on the blanks (except state-insured medications, which were on the blanks).
There was a country-wide common practice of the acceptance of any piece of paper with the name of medication or
INN by pharmacies as a legal prescription. Moreover, there was
no problem buying antibiotics or other Rx
without a prescription at all (excluding the list of restricted and forbidden-to-sell medications).