"Déanann sé staidéar ar leigheas éigeandála."

Translation: He studies emergency medicine.

[willwest0]

Does leigheas mean both the field of medicine and a drug one could take?

[Knocksedan]

Yes.

https://www.teanglann.ie/en/fgb/leigheas

[HupSkup]

I put in "he is studying" first time around and it was wrong ?

[19O492554]

Irish and English both differentiate between the simple present tense (Déanann sé staidéar-"He studies") and the present progressive (Tá sé ag déanamh staidéir-"He is studying").

They aren't interchangeable.