"Eu nu cumpăr de la farmacist."

Translation: I do not buy from the pharmacist.

[tatianandreeva]

What in this sentence points to a definite pharmacist?

[FilipFilip17]

As far as I know, we don’t use the definite articles with prepositions except with “cu“. Although I don’t know if we can use the indefinite article.

[WarsawWill]

In BrE we say "from the chemist". Refused and reported.