Buying antibiotics without prescription

Pal, we are talking about antibiotics here, which are (or were until around covid times) available at thai pharmacies, probably still available in cambodia and some other countries, and which can also be bought online from many countries. 
There are certain medicines, completely harmless and with no or  small toxicity, which are still not available in europe, but available at each thai pharmacy. At the same time there are over the counter medicines in europe convenience stores, which are not easy to find in thailand, a common aspirin being one. Even some european food supplements available at health shops are classified in thailand as medical use and stopped by customs. 
Also within europe there are different laws in each country and medicines are flowing in each possible direction, in one country OTC, in neighbouring prescription one. Laws are changing in each country all the time. Sudden shortages of common medicines lasting for months and years. Bans on export certain small stock medicines. 
It's a jungle out there, which leaves patients confused. 
On top of it, there are huge price differences between countries in europe. So patients, especially less wealthy one, are forced to import cheaper ones. 
thank you, but no thank you, for your priceless advise