This is the 5153rd most frequent Turkish word.
ilaca
The Turkish word "ilaca" means "to the medicine" or "to the drug" (dative case of "ilaç").
The word 'ilaca' is used here as a dative case showing the target being discussed, 'about the medicine'.
Bu sabah bir doktordan ilaca dair bilgi aldım.
This morning, I obtained information about the medicine from a doctor.
Here, 'ilaca' serves as the object of necessity, 'to medicine'.
Eczaneden ilaca ihtiyacım vardı ve bir kutu satın aldım.
I needed medicine from the pharmacy and bought a box.
In this context, 'ilaca' is the object referring to the medicine advised 'to the patient'.