Questions & Answers about Bu ilaçtan uzak dur.
Bu means this. It points to something near the speaker or already being discussed.
So:
- bu ilaç = this medicine / this drug
Unlike English, Turkish does not use articles like a or the, so bu is enough to specify this.
Because Turkish uses the ablative suffix here, which often means from.
- ilaç = medicine, drug
- ilaçtan = from the medicine / away from the medicine
In Bu ilaçtan uzak dur, the idea is literally something like:
- Stay far from this medicine
So -tan is necessary because uzak durmak normally goes with something in the ablative.